List of citizen science projects

Citizen science projects are activities sponsored by a wide variety of organizations so non-scientists can meaningfully contribute to scientific research.

Precis
Activities vary widely from transcribing old ship logbooks to digitize the data as part of the Old Weather project to observing and counting birds at home or in the field for eBird. Participation can be as simple as playing a computer game for a project called Eyewire that may help scientists learn more about retinal neurons. It can also be more in depth, such as when citizens collect water quality data over time to assess the health of local waters, or help discover and name new species of insects. An emerging branch of Citizen Science are Community Mapping projects that utilize smartphone and tablet technology. For example, TurtleSAT is a community mapping project that is mapping freshwater turtle deaths throughout Australia.

This list of citizen science projects involves projects that engage all age groups. There are projects specifically aimed at the younger age demographic like iTechExplorers which was created by a 14 year old in the UK to assess the effects of bedtime technology on the body's circadian rhythm and can be completed in a classroom setting. Other projects like AgeGuess focus on the senior demographics and enable the elderly to upload photos of themselves so the public can guess different ages.

Lists of citizen science projects may change. For example, the Old Weather project website indicates that January 10, 2015, 51% of the logs were completed. When that project reaches 100 percent, it will move to the completed list.<!-- move into the sections below row-by-row Botany, Entomology, Ecology, Lepidopterology, Ornithology, Phenology, Water Quality, Zoology (a) Division of Hydraulics and Environmental Engineering (Department of Civil Engineering, School of Engineering, Aristotle University of Thessaloniki, Greece),
 * Fishing For Jellyfish Galaxies
 * Astronomy, Galactic Research, Astrophysics
 * Zooniverse
 * Worldwide
 * 2023
 * Are we alone in the universe?
 * Astronomy, Search for Extraterrestrial Intelligence, Astrobiology, Radio Astronomy
 * UCLA SETI, The Planetary Society, NASA, Exoplanet Research Program, Zooniverse
 * Worldwide
 * 2023
 * Genome Detectives
 * Biology, Health, Genomes, Disease, Antibiotics, Infections
 * University of Oxford, Zooniverse, Wellcome Trust
 * Worldwide
 * 2020
 * People's Contest Digital Archive
 * History, American Civil War
 * Zooniverse, Pennsylvania State University, Historical Society of Pennsylvania, Albright College
 * Worldwide
 * 2022
 * Alpine Weather News
 * Meteorology, Climate Change
 * Zooniverse
 * Worldwide
 * 2023
 * Name that Neutrino!
 * Astronomy
 * Zooniverse, Drexel University, IceCube Neutrino Observatory
 * Worldwide
 * 2023
 * Adventurers for Audible Bats!
 * Wildlife Biology
 * Oregon State University Cascades, National Park Service
 * Oregon, US
 * 2019
 * Project PANOPTES
 * Astronomy
 * NASA's Universe of Learning
 * Worldwide
 * 2010
 * Muon Hunters
 * Astronomy
 * NSF, Asterics
 * Worldwide
 * 2017
 * Zwicky's Quirky Transients
 * Astronomy
 * Zwicky Transient Facility
 * Worldwide
 * 2019
 * COSMIC
 * Astronomy
 * JPL
 * Worldwide
 * 2019
 * Local Group Cluster Search
 * Astronomy
 * Panchromatic Hubble Andromeda Treasury, Survey of the MAgellanic Stellar History, Northwestern University
 * Worldwide
 * 2019
 * Planet Hunters
 * Astronomy
 * Zooniverse, Yale University
 * Worldwide
 * 2012(?)
 * SuperWASP Variable Stars
 * Astronomy
 * Asterics
 * Worldwide
 * 2018
 * Variable Star Zoo
 * Astronomy
 * Instituto Milenio de Astrofíscia
 * Worldwide
 * 2018
 * Protect Our Planet From Solar Storms
 * Astronomy
 * University of Reading, Science Museum
 * Worldwide
 * 2018
 * Space Warps
 * Astronomy
 * Zooniverse
 * Worldwide
 * 2015(?)
 * Solar Stormwatch
 * Astronomy
 * University of Reading
 * Worldwide
 * 2009
 * Exoplanet Explorers
 * Astronomy
 * BBC Stargazing Live
 * Worldwide
 * 2017
 * Astronomy Rewind
 * Astronomy, History
 * AAS, ADS All Sky Survey, Harvard, Adler Planetarium, NASA
 * Worldwide
 * 2017
 * Gravity Spy
 * Astronomy
 * LIGO Scientific Collaboration, California State University Fullerton, NSF, Northwestern University, Syracuse University
 * Worldwide
 * 2016
 * Kilonova-catcher
 * Astronomy
 * GRANDMA collaboration, University of Paris (2019), Paris-Saclay University
 * Worldwide
 * 2018
 * Radio Meteor Zoo
 * Astronomy
 * European Citizen Science Association
 * Worldwide
 * 2016
 * Milky Way Project
 * Astronomy
 * Adler Planetarium, University of Oxford, NSF, Cal Poly Pomona
 * Worldwide
 * 2010
 * Vigie-Cratère
 * Astronomy
 * National Museum of Natural History, France, University of Paris, CNRS, IRD, Paris Observatory, Grenoble Alpes University, Universcience, the Pythéas Institute, and the Natural History Museum Vienna
 * Worldwide
 * Backyard worlds: Planet 9
 * Astronomy
 * NASA
 * Worldwide
 * 2017
 * RAD@home
 * Astronomy
 * RAD@home Collaboratory
 * India
 * 2013
 * AgeGuess
 * Biology, Aging
 * Center for Research and Interdiciplinarity, University of Southern Denmark
 * Worldwide
 * 2012
 * Agent Exoplanet
 * Astronomy
 * Las Cumbres Observatory Global Telescope Network
 * Goleta, CA, US
 * Air Quality Eggs
 * Air Quality, Pollution, Climate Change, Health
 * WickedDevices, LLC
 * Ithaca, NY, US
 * Anecdata.org
 * Air Quality,
 * Backyard worlds: Planet 9
 * Astronomy
 * NASA
 * Worldwide
 * 2017
 * RAD@home
 * Astronomy
 * RAD@home Collaboratory
 * India
 * 2013
 * AgeGuess
 * Biology, Aging
 * Center for Research and Interdiciplinarity, University of Southern Denmark
 * Worldwide
 * 2012
 * Agent Exoplanet
 * Astronomy
 * Las Cumbres Observatory Global Telescope Network
 * Goleta, CA, US
 * Air Quality Eggs
 * Air Quality, Pollution, Climate Change, Health
 * WickedDevices, LLC
 * Ithaca, NY, US
 * Anecdata.org
 * Air Quality,
 * Air Quality Eggs
 * Air Quality, Pollution, Climate Change, Health
 * WickedDevices, LLC
 * Ithaca, NY, US
 * Anecdata.org
 * Air Quality,
 * Anecdata.org
 * Air Quality,
 * Air Quality,
 * MDI Biological Laboratory
 * Worldwide
 * 2013
 * FrogWatch USA
 * Herpetology, Ecology
 * Association of Zoos and Aquariums
 * US
 * FrogWatch Canada
 * Herpetology, Ecology
 * Nature Canada
 * Canada
 * Amphibian Migrations and Road Crossings
 * Herpetology, Ecology
 * Department of Environmental Conservation, NY, US
 * New York, US
 * Aquila Project
 * Environmental Science
 * West Kimberley Rubber Vine Eradication Program
 * Kimberley, Western Australia, Australia
 * 2010
 * Argosentinel - Argomarine
 * Seas, Pollution
 * FP7 Europe
 * Italy, Portugal, Norway, Greece
 * 2009
 * ARTigo
 * Art history, Computer science
 * Ludwig Maximilian University of Munich, Germany
 * Worldwide
 * 2007
 * ARCS (Arenas for Co-operation through citizen science)
 * All Fields of Science
 * University of Gothenburg, the Swedish University of Agricultural Sciences, Umeå University and the non-profit organisation VA (Public & Science).
 * Sweden
 * 2018
 * Artportalen (Swedish Species Observation System)
 * Biology, biodiversity, species distribution, Mapping
 * Swedish Species Information Centre / Swedish Environmental Protection Agency
 * Sweden
 * 1999
 * Artsobservasjoner
 * Botany, Mycology, Phenology, Species distribution, Zoology
 * Norwegian Directorate for Nature Management, Norway
 * Norway
 * 2008
 * Asteroid Mappers: Vesta
 * Planetary astronomy
 * CosmoQuest.org
 * Worldwide
 * 2011
 * Asteroid Zoo
 * Planetary astronomy
 * Zooniverse collaboration
 * Worldwide
 * 24 June 2014
 * Atlas of Australian Birds
 * Ornithology
 * BirdLife Australia
 * Australia
 * 1973
 * AppEAR
 * Ecology, limnology, water quality
 * Argentina
 * 2015
 * Audubon Christmas Bird Count
 * Ornithology
 * National Audubon Society
 * Western Hemisphere
 * 1900
 * Aurorasaurus
 * Space Physics, Aurora
 * National Science Foundation
 * Worldwide
 * 2014
 * Aussie Backyard Bird Count
 * Ornithology
 * BirdLife Australia
 * Australia
 * 2014
 * B.C. Cetacean Sightings Network
 * Cetology
 * Vancouver Aquarium, Fisheries and Oceans Canada
 * Canada (British Columbia)
 * 1999
 * Backyard Bark Beetles
 * Entomology, Invasive Species
 * Forest Entomology lab at the University of Florida, Gainesville, FL
 * US
 * 2014
 * Bauhinia Genome
 * Biology, Environmental science
 * Community
 * Hong Kong
 * 2015
 * BeeSpotter
 * Entomology
 * University of Illinois at Urbana–Champaign
 * US (IL, IN, MO, OH)
 * 2007
 * Big Bug Hunt
 * Entomology
 * GrowVeg, University of York, Biotechnology and Biological Sciences Research Council, Innovate UK
 * US, UK
 * 2016
 * Big Butterfly Count
 * Lepidopterology, Entomology
 * Butterfly Conservation
 * UK
 * 2010
 * Big Garden Birdwatch
 * Ornithology, Conservation, Ecology
 * Royal Society for the Protection of Birds
 * UK
 * 1979
 * Big Moss Map
 * Botany, Climatology, Peatlands
 * Moors for the Future
 * UK
 * 2015
 * BinSYS Project
 * Mathematics
 * ELTE, SZTAKI
 * Hungary
 * 2005
 * BioBotz, TTA
 * Biology, Ecology
 * Bangladesh
 * BioDiversity Heritage Library Flickr Image Tagging
 * Taxonomy, Ornithology, Entomology, Zoology, Botany
 * Biodiversity Heritage Library
 * Worldwide
 * BioNote
 * Biology, Botany, Zoology, Biogeography, Taxonomy
 * BioNote, University of Gothenburg, Climate-KIC, European Research Council
 * Worldwide
 * 2016
 * BioRiiDL
 * Biology, Environmental science
 * Community
 * India
 * Birdcount India
 * Ornithology, Biology, Ecology, Conservation
 * Bird Count India partnership
 * India
 * 2019
 * Bird Conservation Society of Thailand
 * Ornithology, Biology, Ecology, Conservation
 * BirdLife International
 * Thailand
 * 1993
 * BirdSleuth K–12
 * Ornithology
 * Cornell Lab of Ornithology
 * US
 * 2004
 * Birds and Windows Project
 * Ornithology, Conservation, Ecology
 * University of Alberta
 * Canada
 * 2013
 * Birds-Windows Collisions Project Costa Rica
 * Ornithology, Conservation, Ecology
 * Costa Rica Distance Learning University UNED
 * Costa Rica
 * 2013
 * Brooklyn Atlantis
 * Water Quality, Pollution, Wildlife, Robotics
 * New York University Polytechnic School of Engineering
 * US
 * 2012
 * Project BudBurst
 * Plant Phenology
 * Chicago Botanic Garden, National Science Foundation
 * US
 * 2007
 * Budworm Tracker Program
 * Insect Research
 * John Hughs Forestry Center
 * Fredericton NB, Maine US
 * 2015
 * BugGuide
 * Entomology, Arthropods
 * Iowa State University
 * US, Canada
 * 2003
 * Bumble Bee Watch
 * Entomology
 * Xerces Society, University of Ottawa, Wildlife Preservation Canada, Natural History Museum, London, BeeSpotter, Montréal Insectarium
 * Canada, US
 * 2014
 * Brushturkeys - Birds of Suburbia
 * Ornithology, City Ecology
 * University of Sydney, SPOTTERON Collaboration
 * Australia
 * 2018
 * Canadian National Wildlife Disease Surveillance
 * Wildlife, Health
 * Canadian Wildlife Health Cooperative
 * Canada
 * 1992
 * CanAirIO
 * Air Quality, Pollution, Climate Change, OpenData, Health
 * CanAirIO community, Cos4Cloud - Co-designing Citizen Observatories Services for the European Open Science Cloud, Trébola Organización Ecológica, CanAirIO Developers
 * Colombia
 * 2018
 * Canberra Nature Map
 * Wildlife
 * NatureMapr
 * Australia
 * 2013
 * Cape Citizen Science
 * Biology, Botany, Plant Disease
 * University of Pretoria
 * South Africa
 * 2015
 * Celebrate Urban Birds
 * Ornithology
 * Cornell Lab of Ornithology
 * US
 * Cicada Watch: Brood II
 * Entomology
 * National Geographic Society
 * Northeastern America
 * 2013
 * Cidadão Cientista
 * Environmental science
 * Save Brasil
 * Brazil
 * 2004
 * Ciudadanos Cientifícos
 * Environmental science
 * SIATA Área Metropolitana del Valle de Aburrá
 * Citclops / EyeOnWater
 * Environmental science
 * European Commission
 * Worldwide
 * 2012
 * EyeOnWater Australia
 * Water Colour, Water Quality, Environmental science
 * CSIRO
 * Australia
 * 2017
 * Cities at night
 * Light pollution
 * Complutense University of Madrid and Crowdsourced
 * Worldwide
 * 2014
 * Citizen Seismology
 * Seismology
 * European-Mediterranean Seismological Centre
 * Bruyères-le-Châtel, France
 * Citizen Weather Observer Program (CWOP)
 * Meteorology, climatology, hydrology
 * National Weather Service (NWS)
 * US
 * Ciudadanos Cientifícos
 * Air Quality, Air Pollution, Meteorology
 * Área metropolitana del Valle de Aburrá SIATA
 * Valle de Aburrá - Colombia
 * 2015
 * CitSci.org
 * Water quality, air quality, amphibians, birds, bats, litter, mammals, ecology, environmental science, conservation, community based monitoring
 * Colorado State University
 * Worldwide
 * 2007
 * City Nature Challenge
 * Biology, environmental science
 * California Academy of Sciences, Natural History Museum of Los Angeles County, and local organizations in each city area
 * Worldwide
 * 2017
 * Clean Air Myanmar
 * Climatology
 * Myanmar
 * 2018
 * Climatological observers link
 * Climatology
 * UK
 * 1970
 * Clumpy
 * Biology, Botany
 * University of Exeter
 * Worldwide
 * 2012
 * Cochrane Crowd
 * Health, Medicine, Evidence based medicine
 * Cochrane
 * Worldwide
 * 2016
 * Condor Watch
 * Ornithology, Conservation
 * Zooniverse collaboration
 * California
 * 2014
 * Community Collaborative Rain, Hail and Snow (CoCoRaHS) network
 * Meteorology, Climatology
 * Colorado State University
 * US, Canada
 * 1998
 * Cooperative Observer Program
 * Meteorology, Climatology
 * National Weather Service
 * US
 * 1890
 * Community Snow Observations (CSO)
 * Cryospheric science, hydrology, atmospheric science (meteorology and climatology)
 * NASA
 * US
 * 2017
 * CoralWatch
 * Coral health
 * University of Queensland
 * Australia
 * 2002
 * Crowdcrafting
 * Biology, Physics, Economy, Social, Medicine, Art, Humanities, Ecology, Conservation
 * SciFabric
 * Worldwide
 * 2011
 * CrowdWater
 * Hydrology
 * University of Zurich, Switzerland
 * Worldwide
 * 2017
 * CyanoTracker
 * Algal Bloom, Water Quality
 * University of Georgia
 * Worldwide
 * 2014
 * Darwin's Ark
 * Genomics, Health
 * Broad Institute, University of Massachusetts Medical School
 * Worldwide
 * 2016
 * Did You Feel It?
 * Seismology
 * United States Geological Survey
 * Worldwide
 * Digital Access to a Sky Century @ Harvard
 * Astronomy
 * Center for Astrophysics | Harvard & Smithsonian
 * US
 * 2001
 * DigiVol
 * Entomology, Malacology, Minerals, Archives
 * Australian Museum and Atlas of Living Australia
 * Australia
 * 2011
 * Disk Detective
 * Astronomy
 * NASA, Zooniverse
 * Worldwide
 * 2014
 * Diver Safety Guardian
 * Decompression physiology
 * Divers Alert Network Europe and Divers Alert Network Southern Africa
 * Europe and Africa
 * 1994
 * DIY BIO Hong Kong
 * Biology, Environmental Science
 * Community
 * Hong Kong
 * 2017
 * Doing It Together Science DITOs
 * Biodesign, Environmental Sustainability, Policy
 * UCL, RBINS, UPD, Waag Society, ECSA, Medialab Prado, Kersnikova Institute, Meritum, UNIGE, Tekiu, eutema
 * Europe
 * 2016
 * Dog Aging Project
 * Aging, Biology, Health
 * University of Washington, Texas A&M University, National Institute on Aging
 * US
 * 2019
 * DrugsFromDirt
 * Ecology, Biology, Genetics
 * Laboratory of Genetically Encoded Small Molecules, The Rockefeller University
 * US
 * 2017
 * eBird
 * Ornithology
 * Cornell Lab of Ornithology, National Audubon Society
 * Worldwide
 * 2002
 * eButterfly
 * Lepidopterology, Entomology
 * University of Ottawa, Oregon State University, Vermont Center for Ecostudies
 * US, Canada
 * 2010
 * echidnaCSI
 * Conservation, Ecology, Biology, Genetics
 * University of Adelaide
 * Australia
 * 2017
 * EDDMapS
 * Tracking invasive species, Biology, Botany, Entomology, Wildlife
 * University of Georgia Center for Invasive Species and Ecosystem Health.
 * US, Canada
 * 2005
 * EyeWire
 * Neuroscience
 * MIT, Gatsby Charitable Foundation, NIH, HHMI, Max Planck Society
 * Worldwide
 * 2012
 * Explore the Seafloor
 * Marine Science
 * National Science Week Australia, Australian Broadcasting Corporation
 * Australia
 * 2013
 * Floating Forests
 * Kelp, Marine Science
 * University of Massachusetts Boston, UCLA, Cal State Monterey Bay
 * US
 * 2014
 * Floodcrowd
 * Floods
 * Loughborough University
 * UK
 * 2015
 * Flying ant survey
 * Biology, Entomology, Wildlife
 * Society of Biology, University of Gloucestershire
 * UK
 * 2012
 * Foldit
 * Biology, protein
 * University of Washington
 * Worldwide
 * 2008
 * Fossil Atmospheres
 * Biology, paleontology, climate change
 * Smithsonian Institution
 * Worldwide
 * 2016
 * Fraxinus
 * Genetics
 * Sainsbury Laboratory, BBSRC, DEFRA
 * Worldwide
 * 2013
 * FreshWater Watch
 * Environmental science
 * Earthwatch
 * Worldwide
 * 2012
 * Frog Watch
 * Biology, Environmental Science, Herpetology
 * Community
 * India
 * Galaxy Explorer
 * Astronomy
 * National Science Week Australia, Australian Broadcasting Corporation
 * Australia
 * 2015
 * Galaxy Zoo
 * Astronomy
 * Zooniverse collaboration
 * Worldwide
 * 2007
 * Garden Wildlife Health
 * Conservation, Veterinary
 * Zoological Society of London, British Trust for Ornithology, Froglife, Royal Society for the Protection of Birds
 * UK
 * 2013
 * Geo-Wiki
 * Land cover validation
 * IIASA
 * Worldwide
 * 2008
 * Georgia Adopt-A-Stream
 * Water Quality
 * Georgia, US
 * 1995
 * GeoTag-X
 * Disaster risk reduction
 * United Nations Institute for Training and Research, UNOSAT, Citizen Cyberlab, Seventh Framework Programme
 * Worldwide
 * 2012
 * Globe at Night
 * Astronomy, Light Pollution
 * National Optical Astronomy Observatory, CADIAS, International Dark-Sky Association
 * Worldwide
 * Golden Gate Raptor Observatory
 * Ornithology, Migration, Phenology, Population Change
 * Golden Gate Natl Parks Conservancy
 * Pacific States
 * 1984
 * Great Backyard Bird Count
 * Ornithology
 * National Audubon Society, Cornell Lab of Ornithology
 * Worldwide
 * Great Cocky Count
 * Ornithology
 * Birdlife Australia
 * Western Australia
 * 2009
 * Great World Wide Star Count
 * Astronomy
 * Windows to the Universe, National Earth Science Teachers Association
 * Worldwide
 * Genographic Project
 * Population genetics
 * National Geographic Society, IBM
 * Worldwide
 * 2005
 * Go Viral Study
 * Infectious Disease
 * National Science Foundation, OpenHumans, New York University
 * US
 * 2013
 * Habitat Network
 * Conservation, Ornithology, Wildlife
 * The Nature Conservancy and the Cornell Lab of Ornithology
 * North America
 * 2012
 * Hare Survey
 * Biology, Wildlife
 * Moors for the Future Partnership
 * UK
 * 2015
 * Hazelnut Project, The
 * Botany, Agronomy
 * Hybrid Hazelnut Consortium (Arbor Day Foundation, University of Nebraska–Lincoln, Rutgers and Oregon State)
 * US
 * 2000
 * Herbarium@home
 * Botany
 * Botanical Society of Britain and Ireland
 * UK
 * 2006
 * Herbonauten (Pilot)
 * Botany, Natural History
 * Verein der Freunde des Botanischen Gartens und Botanischen Museums Berlin-Dahlem
 * Worldwide (Germany)
 * 2016
 * Herpetological Education and Research Project
 * Herpetology
 * HERP Board of Trustees
 * North America
 * 2007
 * HerpMapper
 * Herpetology, Ecology, Citizen Science, Conservation, Phenology, Research
 * HerpMapper Advisory Committee
 * Worldwide
 * 2013
 * Hidden World of Bacteria
 * Microbiology, Taxonomy
 * Sparkling Science, University of Innsbruck
 * Austria
 * 2017
 * Higgs Hunters
 * Physics, Particle Physics
 * Higgs Hunters Classify
 * Worldwide
 * 2014
 * Hong Kong Bird Watching Society
 * Biology, Ecology
 * Hong Kong Bird Watching Society
 * Hong Kong
 * 1957
 * Hong Kong Entomological Society
 * Biology, Ecology, Entomology
 * Hong Kong Entomological Society
 * Hong Kong
 * 2008
 * Hong Kong Jellyfish Project
 * Conservation, Biology, Ecology, Marine Biology
 * Hong Kong
 * 2020
 * Hummingbirds at Home
 * Ornithology
 * National Audubon Society
 * US
 * 2013
 * Hummingbird Migration Tracker
 * Ornithology
 * Birdfeeders.com
 * US
 * 2010
 * IDAH2O Master Water Stewards
 * Water Quality
 * University of Idaho
 * US
 * 2010
 * Identify animals
 * Conservation Biology
 * Victoria University of Wellington
 * New Zealand
 * 2015
 * ISeeChange
 * Meteorology, Climatology, Remote Sensing, Phenology, Ecology, Citizen Journalism
 * ISeeChange
 * Worldwide
 * 2012
 * IceWatchUSA
 * Phenology
 * Nature Abounds
 * US
 * iNaturalist
 * Botany, Entomology, Ecology, Lepidopterology, Ornithology, Phenology, Zoology
 * California Academy of Sciences
 * Worldwide
 * 2008
 * India Biodiversity Portal
 * Computer Science, Biology, Environmental Science
 * Prabhakar / Thomas Vattakaven
 * India
 * Instant Wild
 * Wildlife, Ecology, Species Diversity, Conservation, Zoology
 * Zoological Society of London
 * Worldwide
 * 2011
 * iSeahorse
 * Ichthyology, Ecology, Marine Biology, Marine Conservation, Zoology
 * Project Seahorse, Guylian Belgian Chocolate, iNaturalist, John G. Shedd Aquarium, The University of British Columbia, Zoological Society of London
 * Worldwide
 * 2013
 * iSpot
 * Nature
 * The Open University
 * Worldwide
 * 2009
 * iTech Explorers
 * Psychology, Biology, Evidence based medicine, Health
 * Community
 * Worldwide
 * 2019
 * Kelab Alami
 * Ecology, Mangroves, Biodiversity
 * Community
 * Malaysia
 * 2009
 * Kinsey Reporter
 * Sex and Attraction
 * The Kinsey Institute
 * Worldwide
 * 2012
 * Koala Count
 * Wildlife
 * NatureMapr
 * Australia
 * 2014
 * Landscape Watch Hampshire
 * Environmental science, Geography
 * Crowdsourcing Landscape Change Consortium
 * Hampshire, UK
 * 2015
 * Landslide Reporter
 * Natural hazards, Environmental science, Geography
 * NASA Goddard Space Flight Center
 * Worldwide
 * 2018
 * Lingscape
 * Linguistic landscape, Sociolinguistics
 * University of Luxembourg
 * Worldwide
 * 2016
 * Literati
 * Environmental Science, Pollution, Human Impact, Biology
 * Worldwide
 * first photo 2012; app debut 2016
 * Litterbug (Dreckspotz)
 * Environmental Science, Pollution, Human Impact, Resources
 * Global 2000, Friends of Earth, SPOTTERON Collaboration
 * Europe
 * 2017
 * Local Environmental Observer (LEO) Network
 * Environmental change, Climate change impacts, Ecology, Human well-being, Knowledge integration
 * Alaska Native Tribal Health Consortium, US Environmental Protection Agency, Commission for Environmental Cooperation, First Nations Health Authority
 * Worldwide
 * 2012
 * Loss of the Night app
 * Astronomy, Ecology, Remote Sensing
 * Federal Ministry of Education and Research (Germany), Freie Universität Berlin, Leibniz Institute of Freshwater Ecology and Inland Fisheries
 * Germany
 * 2013
 * Massachusetts Herpetological Atlas
 * Herpetology
 * University of Massachusetts Amherst
 * US
 * 1992
 * MammalMAP
 * Mammal Conservation
 * Animal Demography Unit, Marine Research Institute
 * Africa
 * 2012
 * MangroveWatch
 * Wetlands, Monitoring, Mangrove, Conservation, Ecology
 * James Cook University, The University of Queensland, Australian Government National Landcare Programme, TropWATER], The Burnett Mary Regional Group, Queensland Department of Primary Industries, OceanWatch Australia Ltd, Earth Protect
 * Worldwide
 * 2009
 * Manta Matcher - The Wildbook for Manta Rays
 * Marine Ecology, Conservation Biology, Ecology
 * Wild Me, Marine Megafauna Foundation
 * Worldwide
 * 2012
 * MapIt
 * Environmental Science, Pollution, Biology, Trash Blindness, Cartography, Human geography
 * Microsoft, Carto, QUALITANCE, Republic of Estonia Ministry of Environment, ISGF, JCI, AIESEC, Let's Do It Foundation
 * Worldwide
 * World Cleanup app launch 2017; MapIt campaign launch April 2018
 * Marine Metres Squared
 * Marine Ecology, Conservation Biology
 * New Zealand Marine Studies Centre
 * New Zealand
 * Mark2Cure
 * Biomedical research
 * The Su Lab at Scripps Research Institute
 * US (CA)
 * 2012, launch 2015
 * MeteorITo
 * Meteorological phenomena
 * Hacedores
 * Mexico
 * 2017
 * Michigan Herp Atlas Project
 * Herpetology
 * Michigan Department of Natural Resources
 * US (MI)
 * 2004
 * MICS
 * Impact of citizen science
 * European Commission
 * Worldwide
 * 2019
 * Mitten Crab Recording Project
 * Marine Biology, Invasive Species
 * Marine Biological Association of the United Kingdom
 * UK
 * Monarch Health
 * Entomology, Lepidopterology
 * University of Georgia
 * Canada, US
 * Monarch Larva Monitoring Project
 * Entomology, Lepidopterology
 * University of Minnesota
 * Canada, US
 * Monarch Watch
 * Entomology, Lepidopterology
 * University of Kansas
 * Canada, US
 * 1992
 * Moon Mappers
 * Simply craters
 * Man vs machine
 * Planetary astronomy
 * CosmoQuest.org
 * Worldwide
 * 2011
 * Mosquito Alert
 * Entomology, Ecology, Public Health
 * Center for Ecological Research and Forestry Applications (CREAF) and Center for Advance Studies of Blanes (CEAB-CSIC)
 * Spain
 * 2013
 * Mozak
 * Neuroscience
 * Center for Game Science
 * Worldwide
 * 2016
 * National Moth Week (NMW)
 * Entomology
 * Friends of the East Brunswick Environmental Commission
 * Worldwide
 * 2012
 * Nature's Calendar
 * Phenology
 * Woodland Trust
 * UK
 * Nature's Calendar
 * Phenology
 * Zentralanstalt für Meteorologie und Geodynamik (ZAMG), SPOTTERON Collaboration
 * Europe
 * 2018
 * Nature's Notebook
 * Phenology
 * USA National Phenology Network
 * US
 * 2009
 * NatureWatch
 * FrogWatch
 * IceWatch
 * PlantWatch
 * WormWatch
 * Ecology, Phenology, Herpetology
 * Nature Canada
 * Canada
 * NatureWatch NZ
 * Botany, Entomology, Ecology, Ornithology, Phenology, Zoology
 * New Zealand Bio-Diversity Recording Network Trust
 * New Zealand
 * 2006 (as NZBRN)
 * Natusfera
 * Biodiversity
 * Spanish GBIF node, Center for Ecological Research and Forestry Applications (CREAF), Institute of Marine Sciences (ICM-CSIC), FECyT
 * Europe
 * 2016
 * Neighborhood Nestwatch
 * Ornithology
 * Migratory Bird Center, National Zoological Park, SI
 * US
 * NestWatch
 * Ornithology
 * Cornell Lab of Ornithology
 * Americas
 * 2008
 * North American Field Herping Association
 * Herpetology
 * North American field herping community
 * North America
 * 2007
 * North American Bird Phenology Program
 * Ornithology
 * United States Geological Survey
 * North America
 * 2008
 * Notes from Nature
 * Botany, Entomology, Ornithology, Mycology
 * Zooniverse collaboration
 * Worldwide
 * Observation.org
 * Botany, Entomology, Ecology, Lepidopterology, Ornithology, Phenology, Zoology
 * Worldwide
 * Odonata Central
 * Odonata
 * North America
 * 2004
 * Old Weather
 * Climatology
 * Zooniverse collaboration
 * Worldwide
 * Ontario BioBlitz
 * Botany, Ecology, Entomology, Herpetology, Ichthyology, Lepidopterology, Ornithology
 * Royal Ontario Museum, Canadian Wildlife Federation, Nature Conservancy of Canada, Ontario Nature, Toronto Zoo, Toronto and Region Conservation Authority
 * Canada (Ontario)
 * 2012
 * Ontario Butterfly Atlas Online
 * Lepidopterology, Entomology
 * Toronto Entomologists’ Association
 * Canada (Ontario)
 * 1969
 * Ontario Reptile and Amphibian Atlas
 * Herpetology
 * Ontario Nature, Ministry of Natural Resources’ Natural Heritage Information Centre (NHIC)
 * Canada (Ontario)
 * Operation Wallacea
 * Biodiversity
 * Worldwide
 * UK
 * 1996
 * Orca Game
 * Bioacoustics
 * Orchive
 * Worldwide
 * 2013
 * Orchids:Terrestrial Spiranthes in an Urban Environment
 * Urban Conservation
 * Hoyt Arboretum
 * Portland, OR
 * 2014
 * Ornitho Deutschland
 * Ornithology
 * Dachverband Deutscher Avifaunisten
 * Austria, France (part), Germany, Italy, Luxemburg, Poland, Spain (part), Switzerland
 * October 2011
 * OSDG Community platform
 * Sustainable Development Goals, Machine Learning
 * OSDG, UNDP IICPSD SDG AI Lab, PPMI
 * Worldwide
 * 2021
 * Painted Lady Migration Project
 * Lepidopterology
 * Institut de Biologia Evolutiva, National Geographic, Marie Skłodowska-Curie Actions, British Ecological Society, Barcelona zoo, Harvard University, Zerynthia Association
 * Worldwide
 * PARS (Pennsylvania Amphibian and Reptile Survey)
 * Biology, Marine biology, Environmental protection
 * MACHAC
 * Pennsylvania, US
 * Penguin Watch
 * Ornithology
 * Zooniverse collaboration
 * Worldwide
 * Pieris Project
 * Lepidopterology, Entomology
 * theryanlab.com
 * Worldwide
 * 2014
 * Pl@ntNet
 * Botany
 * Inra Inria
 * Worldwide
 * 2008
 * Pilzfinder
 * Mycology
 * Austrian Mycology Society, University of Vienna, SPOTTERON collaboration
 * Europe
 * 2019
 * Planet Mappers: Mercury
 * Planetary astronomy
 * CosmoQuest.org
 * Worldwide
 * 2011
 * Plankton Project
 * Marine biology, Zoology
 * Zooniverse collaboration
 * Worldwide
 * 2013
 * Portland Urban Coyote Project
 * Ecology, Geography, Zoology, Human Dimensions of Wildlife, Mapping
 * Portland State University
 * Portland, Oregon
 * 2011
 * PressureNET
 * Meteorology, Climatology
 * Cumulonimbus Inc.
 * Worldwide
 * 2011
 * Project Roadkill
 * Ecology, Road Safety
 * University of Natural Resources and Life Sciences, Vienna
 * Worldwide
 * 2014
 * Project Splatter (Now The Road Lab)
 * Ecology, Conservation
 * Cardiff University
 * UK
 * 2013
 * Project Discovery I.
 * Biology, Cellular biology
 * Human Protein Atlas (KTH), CCP Games, MMOS
 * Worldwide
 * 2016
 * Project Discovery II.
 * Astronomy
 * University of Geneva, CCP Games, MMOS
 * Worldwide
 * 2017
 * Project Dive Exploration (PDE)
 * Decompression research
 * Divers Alert Network
 * North America
 * Project Soothe
 * Clinical psychology, Psychotherapy
 * University of Edinburgh
 * Worldwide
 * 2014
 * Public Lab
 * Ecology, environmental science
 * The Public Laboratory for Open Technology and Science
 * US
 * 2010
 * PurpleAir
 * Air quality, environmental science
 * Worldwide
 * 2015
 * Quantum Moves
 * Quantum physics, Quantum mechanics
 * CODER, Aarhus University
 * Worldwide
 * 2013
 * Radio Galaxy Zoo
 * Radio Astronomy
 * Zooniverse
 * Worldwide
 * December 2013
 * Redmap (Range Extension Database and Mapping Project)
 * Marine Ecology, Species distribution, Climate Change
 * Institute for Marine and Antarctic Studies, University of Tasmania
 * Australia
 * 2009
 * Redmet
 * Environmental Meteorological Network
 * Hacedores
 * Mexico
 * 2017
 * Reading Nature's Library
 * Manchester Museum, University of Manchester
 * UK
 * Reef Life Survey (RLS)
 * Institute for Marine and Antarctic Studies, University of Tasmania
 * Australia
 * Reef Check Med
 * Marine Biology, Marine Ecology, Environmental Science, Global change, Human impact on marine life
 * Reef Check Italia, Reef Check Deutschland, Reef Check France, Reef Check worldwide foundation
 * Mediterranean Sea
 * 2016
 * Reef Environmental Education Foundation (REEF)
 * Marine conservation, Marine biology
 * Non-profit organization
 * Key Largo, FL (worldwide)
 * 1990
 * Report-a-weed
 * Biodiversity
 * British Columbia government
 * Canada
 * unknown
 * Roadkill
 * Biodiversity, transportation
 * University of Natural Resources and Life Sciences, Vienna, SPOTTERON Collaboration
 * Worldwide
 * 2015
 * SatCam
 * Meteorology
 * University of Wisconsin–Madison
 * Worldwide
 * Science Gossip Biodiversity Heritage Library
 * Biodiversity, libraries, art
 * Zooniverse collaboration
 * Worldwide
 * 2015
 * Safecast
 * Ionizing radiation, Air Quality
 * Momoko Ito Foundation
 * Worldwide
 * 2011
 * SciStarter
 * All Fields of Science
 * Research affiliate Arizona State University
 * Worldwide
 * 2011
 * SeagrassSpotter
 * Seagrass
 * Project Seagrass
 * Worldwide - Marine
 * 2016
 * Secchi Disk
 * Phytoplankton
 * Secchi Disk Project
 * Worldwide - Marine
 * 2013
 * Sensafety
 * Urbanism, Urban studies
 * Technische Universität Berlin
 * Worldwide
 * 2019
 * Sensing the Air
 * Biology
 * Israel
 * Sensor.Community
 * Air quality, Noise
 * Worldwide
 * 2015
 * SETI@home
 * Astronomy
 * University of California, Berkeley
 * Worldwide
 * 1999
 * Sharkbook / Sharkbook
 * Conservation, Marine Biology, Wildlife Biology, Ecology
 * Marine Megafauna Foundation, Wild Me
 * Worldwide
 * 2012(?)
 * The Shore Thing Project
 * Biology, Marine Biology, Invasive Species, Climate Change
 * Marine Biological Association of the United Kingdom
 * UK
 * 2006
 * Smart Citizen Kit 2.1
 * Air quality, Noise, Pollution
 * Worldwide
 * Smithsonian Transcription Center
 * Astronomy, Botany, Entomology
 * Smithsonian Institution
 * US
 * 2014
 * Snowtweets
 * Meteorology
 * University of Waterloo
 * Canada
 * Socientize
 * Life sciences mainly
 * European Commission
 * Worldwide
 * 2012
 * Speak to AI
 * Artificial Intelligence, Machine Learning, Linguistics
 * University of California, Irvine
 * Worldwide
 * 2018
 * SPLASSH
 * Water Quality, Pollution
 * Kennesaw State University
 * Worldwide
 * 2013
 * Species Observations System
 * Botany, Entomology, Ecology, Ornithology, Phenology, Zoology
 * Norwegian Biodiversity Information Centre, Norwegian Biodiversity Network
 * Norway
 * 2008
 * Stall Catchers
 * Biomedical, Alzheimer's,
 * A game to accelerate Alzheimer's research
 * Worldwide
 * 2015
 * Striped AmBASSadors
 * Fisheries, Conservation, Ecology
 * Striped Bass Research Team, Acadia University
 * NS, Canada
 * 2010
 * Taiwan Roadkill Observation Network
 * Engineering, Environmental Science, Ecology
 * Lusheng Society
 * Taiwan
 * 2019
 * Taiwan Breeding Bird Survey
 * Biology, Life Science, Ecology
 * The Bird Breeding Survey of Taiwan
 * Taiwan
 * 2019
 * Target Asteroids!
 * Planetary astronomy
 * OSIRIS-REx asteroid sample return mission
 * Worldwide
 * 2012
 * Target NEOs!
 * Planetary astronomy
 * The Astronomical League
 * US
 * 2012
 * Taxon expeditions
 * Biodiversity, Ecology
 * Taxon Expeditions
 * Borneo, Montenegro
 * 2017
 * Teatime4Science
 * Botany, Climate change, Ecology, Pedology
 * The TBI team, Utrecht University
 * Worldwide
 * 2016
 * The Road Lab (Formally Project Splatter)
 * Ecology, Conservation
 * Cardiff University
 * UK
 * 2013
 * theSkyNet
 * Astronomy, Computing
 * International Centre for Radio Astronomy Research
 * Worldwide
 * 2011
 * TooLoud
 * Computing, Physics
 * Community
 * Bangladesh
 * Track a Tree
 * Botany, Ecology, Phenology
 * University of Edinburgh and the Woodland Trust
 * UK
 * 2014
 * Track My Fish
 * Fisheries, Ecology, Tagging
 * Striped Bass Research Team, Acadia University
 * Canada
 * 2012
 * TreeSnap
 * Forestry, Invasive Species, Botany
 * University of Kentucky, University of Tennessee
 * US
 * 2017
 * Turtle Survey and Analysis Tools (TurtleSAT)
 * Herpetology
 * University of Sydney, University of Western Sydney
 * Australia
 * 2014
 * UBiome
 * Microbiology
 * uBiome
 * US
 * URwatair
 * Air Quality, Air Pollution, Hydrology
 * Elliniki Etairia (Society for the Environment and Cultural Heritage - Thessalonik Branch), in collaboration with
 * 2017
 * Project Dive Exploration (PDE)
 * Decompression research
 * Divers Alert Network
 * North America
 * Project Soothe
 * Clinical psychology, Psychotherapy
 * University of Edinburgh
 * Worldwide
 * 2014
 * Public Lab
 * Ecology, environmental science
 * The Public Laboratory for Open Technology and Science
 * US
 * 2010
 * PurpleAir
 * Air quality, environmental science
 * Worldwide
 * 2015
 * Quantum Moves
 * Quantum physics, Quantum mechanics
 * CODER, Aarhus University
 * Worldwide
 * 2013
 * Radio Galaxy Zoo
 * Radio Astronomy
 * Zooniverse
 * Worldwide
 * December 2013
 * Redmap (Range Extension Database and Mapping Project)
 * Marine Ecology, Species distribution, Climate Change
 * Institute for Marine and Antarctic Studies, University of Tasmania
 * Australia
 * 2009
 * Redmet
 * Environmental Meteorological Network
 * Hacedores
 * Mexico
 * 2017
 * Reading Nature's Library
 * Manchester Museum, University of Manchester
 * UK
 * Reef Life Survey (RLS)
 * Institute for Marine and Antarctic Studies, University of Tasmania
 * Australia
 * Reef Check Med
 * Marine Biology, Marine Ecology, Environmental Science, Global change, Human impact on marine life
 * Reef Check Italia, Reef Check Deutschland, Reef Check France, Reef Check worldwide foundation
 * Mediterranean Sea
 * 2016
 * Reef Environmental Education Foundation (REEF)
 * Marine conservation, Marine biology
 * Non-profit organization
 * Key Largo, FL (worldwide)
 * 1990
 * Report-a-weed
 * Biodiversity
 * British Columbia government
 * Canada
 * unknown
 * Roadkill
 * Biodiversity, transportation
 * University of Natural Resources and Life Sciences, Vienna, SPOTTERON Collaboration
 * Worldwide
 * 2015
 * SatCam
 * Meteorology
 * University of Wisconsin–Madison
 * Worldwide
 * Science Gossip Biodiversity Heritage Library
 * Biodiversity, libraries, art
 * Zooniverse collaboration
 * Worldwide
 * 2015
 * Safecast
 * Ionizing radiation, Air Quality
 * Momoko Ito Foundation
 * Worldwide
 * 2011
 * SciStarter
 * All Fields of Science
 * Research affiliate Arizona State University
 * Worldwide
 * 2011
 * SeagrassSpotter
 * Seagrass
 * Project Seagrass
 * Worldwide - Marine
 * 2016
 * Secchi Disk
 * Phytoplankton
 * Secchi Disk Project
 * Worldwide - Marine
 * 2013
 * Sensafety
 * Urbanism, Urban studies
 * Technische Universität Berlin
 * Worldwide
 * 2019
 * Sensing the Air
 * Biology
 * Israel
 * Sensor.Community
 * Air quality, Noise
 * Worldwide
 * 2015
 * SETI@home
 * Astronomy
 * University of California, Berkeley
 * Worldwide
 * 1999
 * Sharkbook / Sharkbook
 * Conservation, Marine Biology, Wildlife Biology, Ecology
 * Marine Megafauna Foundation, Wild Me
 * Worldwide
 * 2012(?)
 * The Shore Thing Project
 * Biology, Marine Biology, Invasive Species, Climate Change
 * Marine Biological Association of the United Kingdom
 * UK
 * 2006
 * Smart Citizen Kit 2.1
 * Air quality, Noise, Pollution
 * Worldwide
 * Smithsonian Transcription Center
 * Astronomy, Botany, Entomology
 * Smithsonian Institution
 * US
 * 2014
 * Snowtweets
 * Meteorology
 * University of Waterloo
 * Canada
 * Socientize
 * Life sciences mainly
 * European Commission
 * Worldwide
 * 2012
 * Speak to AI
 * Artificial Intelligence, Machine Learning, Linguistics
 * University of California, Irvine
 * Worldwide
 * 2018
 * SPLASSH
 * Water Quality, Pollution
 * Kennesaw State University
 * Worldwide
 * 2013
 * Species Observations System
 * Botany, Entomology, Ecology, Ornithology, Phenology, Zoology
 * Norwegian Biodiversity Information Centre, Norwegian Biodiversity Network
 * Norway
 * 2008
 * Stall Catchers
 * Biomedical, Alzheimer's,
 * A game to accelerate Alzheimer's research
 * Worldwide
 * 2015
 * Striped AmBASSadors
 * Fisheries, Conservation, Ecology
 * Striped Bass Research Team, Acadia University
 * NS, Canada
 * 2010
 * Taiwan Roadkill Observation Network
 * Engineering, Environmental Science, Ecology
 * Lusheng Society
 * Taiwan
 * 2019
 * Taiwan Breeding Bird Survey
 * Biology, Life Science, Ecology
 * The Bird Breeding Survey of Taiwan
 * Taiwan
 * 2019
 * Target Asteroids!
 * Planetary astronomy
 * OSIRIS-REx asteroid sample return mission
 * Worldwide
 * 2012
 * Target NEOs!
 * Planetary astronomy
 * The Astronomical League
 * US
 * 2012
 * Taxon expeditions
 * Biodiversity, Ecology
 * Taxon Expeditions
 * Borneo, Montenegro
 * 2017
 * Teatime4Science
 * Botany, Climate change, Ecology, Pedology
 * The TBI team, Utrecht University
 * Worldwide
 * 2016
 * The Road Lab (Formally Project Splatter)
 * Ecology, Conservation
 * Cardiff University
 * UK
 * 2013
 * theSkyNet
 * Astronomy, Computing
 * International Centre for Radio Astronomy Research
 * Worldwide
 * 2011
 * TooLoud
 * Computing, Physics
 * Community
 * Bangladesh
 * Track a Tree
 * Botany, Ecology, Phenology
 * University of Edinburgh and the Woodland Trust
 * UK
 * 2014
 * Track My Fish
 * Fisheries, Ecology, Tagging
 * Striped Bass Research Team, Acadia University
 * Canada
 * 2012
 * TreeSnap
 * Forestry, Invasive Species, Botany
 * University of Kentucky, University of Tennessee
 * US
 * 2017
 * Turtle Survey and Analysis Tools (TurtleSAT)
 * Herpetology
 * University of Sydney, University of Western Sydney
 * Australia
 * 2014
 * UBiome
 * Microbiology
 * uBiome
 * US
 * URwatair
 * Air Quality, Air Pollution, Hydrology
 * Elliniki Etairia (Society for the Environment and Cultural Heritage - Thessalonik Branch), in collaboration with
 * 2012
 * Taxon expeditions
 * Biodiversity, Ecology
 * Taxon Expeditions
 * Borneo, Montenegro
 * 2017
 * Teatime4Science
 * Botany, Climate change, Ecology, Pedology
 * The TBI team, Utrecht University
 * Worldwide
 * 2016
 * The Road Lab (Formally Project Splatter)
 * Ecology, Conservation
 * Cardiff University
 * UK
 * 2013
 * theSkyNet
 * Astronomy, Computing
 * International Centre for Radio Astronomy Research
 * Worldwide
 * 2011
 * TooLoud
 * Computing, Physics
 * Community
 * Bangladesh
 * Track a Tree
 * Botany, Ecology, Phenology
 * University of Edinburgh and the Woodland Trust
 * UK
 * 2014
 * Track My Fish
 * Fisheries, Ecology, Tagging
 * Striped Bass Research Team, Acadia University
 * Canada
 * 2012
 * TreeSnap
 * Forestry, Invasive Species, Botany
 * University of Kentucky, University of Tennessee
 * US
 * 2017
 * Turtle Survey and Analysis Tools (TurtleSAT)
 * Herpetology
 * University of Sydney, University of Western Sydney
 * Australia
 * 2014
 * UBiome
 * Microbiology
 * uBiome
 * US
 * URwatair
 * Air Quality, Air Pollution, Hydrology
 * Elliniki Etairia (Society for the Environment and Cultural Heritage - Thessalonik Branch), in collaboration with
 * University of Sydney, University of Western Sydney
 * Australia
 * 2014
 * UBiome
 * Microbiology
 * uBiome
 * US
 * URwatair
 * Air Quality, Air Pollution, Hydrology
 * Elliniki Etairia (Society for the Environment and Cultural Heritage - Thessalonik Branch), in collaboration with
 * URwatair
 * Air Quality, Air Pollution, Hydrology
 * Elliniki Etairia (Society for the Environment and Cultural Heritage - Thessalonik Branch), in collaboration with

(b) Environmental Informatics Research Group (Department of Mechanical Engineering, School of Engineering, Aristotle University of Thessaloniki, Greece)
 * Greece
 * 2019–2020
 * VerbCorner
 * Linguistics
 * Massachusetts Institute of Technology
 * Worldwide
 * 2013
 * VT Fish Diaries
 * Fisheries
 * US (VT)
 * 2015
 * Vermont Reptile & Amphibian Atlas
 * Herpetology
 * US (VT)
 * 1995
 * Volunteer Water Quality Monitoring Programs (thousands)
 * Water Quality
 * US
 * 1969–present
 * Water Action Volunteers
 * Water Quality
 * University of Wisconsin-Extension and Wisconsin Department of Natural Resources
 * US (WI)
 * 1996
 * Weather Detective
 * Climatology, Meteorology
 * National Science Week Australia, Australian Broadcasting Corporation
 * Australia
 * 2014
 * What Do Birds Eat?
 * Ornithology
 * University of Delaware
 * US
 * 2015
 * Whistler Biodiversity Project
 * Biodiversity
 * Whistler Biodiversity Project
 * Canada
 * 2004
 * Wikispecies
 * Biodiversity
 * Wikimedia Foundation
 * Worldwide
 * 2004
 * Wildbook
 * Wildlife, Population ecology, Mark-recapture
 * Wild Me
 * Worldwide
 * 2001
 * WildlifeLog.org
 * Wildlife
 * WildlifeLog Community Interest Company
 * Worldwide
 * 2014
 * Wildmentor.org
 * Conservation
 * Bangladesh
 * 2018
 * Wildsense Tigers
 * Wildlife
 * The Wildsense Project, University of Surrey
 * Worldwide
 * 2015
 * Wisconsin Odonata Survey
 * Odonata, Biology
 * Wisconsin Department of Natural Resources
 * US (WI)
 * Wombat Survey and Analysis Tools (WomSAT)
 * Mammalogy
 * WomSAT.org.au
 * Australia
 * 2015
 * Stardust@Home
 * Astronomy
 * University of California, Berkeley
 * Worldwide
 * 2006
 * Yellowhammer Dialects
 * Ornithology
 * Charles University in Prague
 * UK, New Zealand
 * 2013
 * Wakame Watch
 * Marine Biology, Invasive Species
 * Marine Biological Association of the United Kingdom
 * UK
 * 2014
 * Wildlife Spotter
 * Ecology
 * National Science Week Australia, Australian Broadcasting Corporation
 * Australia
 * 2016
 * SeasonWatch
 * Botany, Ecology
 * Nature Conservation Foundation
 * India
 * 2014
 * Zikathon / Mosquito Alert
 * Biology, Environmental Science
 * Hong Kong
 * 2017
 * PakAirQuality
 * Air Quality, Environmental science
 * Pakistan
 * 2020
 * Respirer Living Sciences
 * Air Quality, Environmental science
 * Indian Institute of Technology Kanpur
 * India
 * 2017
 * AirBox
 * Air Quality, Environmental science
 * Taiwan, South Korea
 * 2017
 * DustBoy
 * Air Quality, Environmental science
 * Thailand
 * 2019-->
 * Botany, Ecology
 * Nature Conservation Foundation
 * India
 * 2014
 * Zikathon / Mosquito Alert
 * Biology, Environmental Science
 * Hong Kong
 * 2017
 * PakAirQuality
 * Air Quality, Environmental science
 * Pakistan
 * 2020
 * Respirer Living Sciences
 * Air Quality, Environmental science
 * Indian Institute of Technology Kanpur
 * India
 * 2017
 * AirBox
 * Air Quality, Environmental science
 * Taiwan, South Korea
 * 2017
 * DustBoy
 * Air Quality, Environmental science
 * Thailand
 * 2019-->
 * Taiwan, South Korea
 * 2017
 * DustBoy
 * Air Quality, Environmental science
 * Thailand
 * 2019-->
 * Thailand
 * 2019-->
 * 2019-->

Worldwide
Citizen scientists anywhere in the world can participate in these projects.

Regional
These projects require that citizen scientists be local to a region of study.