User:Moodley.10/sandbox

just trying this out for class. Need a good page to research and edit.

annotated bib:Jenna Moodley Recitation Tuesday 1:50 Evolution

Topic: Origin of avian flight How did avian flight evolve and what made it possible?

1.	Feduccia, A. (1996). The origin and evolution of birds. New Haven: Yale University Press. This book should have good detailed descriptions of both birds and and their similar species as well as its chapter of the evolution of flightlessness.

2.	Benton, M. J. (January 01, 2014). Evolution. How birds became birds. Science (new York, N.y.), 345, 6196, 508-9. This article gives a good overview of how fight is possible and the evolutionary steps to achieve this. The article also explains the bird’s relationship to dinosaurs as well as how our understanding has changed in the past couplee decades.

3.	PADIAN, K. E. V. I. N., & CHIAPPE, L. U. I. S. M. (January 01, 1998). The origin and early evolution of birds. Biological Reviews, 73, 1, 1-42. This article gives more information on how flight was possible as well as how evolution was not pushed for flight but had other survival benefits. It also discusses there evolution with dinosaurs and the “bottleneck” effect in diversity that gave us the birds we have today.

4.	Feduccia, A. (January 01, 2001). Fossils and avian evolution. Nature, 414, 6863, 507-8 This article will help show that the evolution of avian flight and what we know about it is based a lot on fossil evidence. It goes on to explain how recent fossil finds have changed our views on that evolution.

5.	Hingston, P. F., Barone, L. C., & Michalewicz, Z. (2008). Design by evolution: Advances in evolutionary design. Berlin: Springer. This book will hopefully show why these mutations that lead to flight were selected for. Many were not selected for flight to happen but gave species other advantages and later helped them achieve flight.

OCT.1 Assignment:

https://en.wikipedia.org/wiki/Origin_of_avian_flight#Cursorial_model

Suggestions: Modern birds evolved from a specific type of theropods, maniraptor. The article could go on to mention traits found in these maniraptors that are common features in todays birds i.e. feathersMoodley.10 (talk) 03:24, 1 October 2014 (UTC)moodley.10

The opening paragraph mentions Archaeopteryx multiple times and yes, that was the oldest fossil found but the major features that make flight possible are also important an could be summed up somewhat in the first paragraph Moodley.10 (talk) 03:24, 1 October 2014 (UTC)

I agree that there are many similarities with the "Origin of Birds" this page should be more about how flight became possible? Keep it focused on the theories and biology verses actual phylogenetics Moodley.10 (talk) 22:52, 30 September 2014 (UTC)

Edit: This wing motion is thought to have evolved from asymmetrical propulsion flapping motion.

Birds use wing assisted inclined running from the day they hatch to increase locomotion. This can also be said for birds or feathered therapods whose wing muscles cannot generate enough force to fly, and shows how this behavior could have evolved to help these therapods then eventually led to flight.

The progression from wing assisted incline running to flight can be seen in the growth of birds, from when they are hatchlings to fully grown. They begin with wing assisted incline running and slowly alter their wing strokes for flight as they grow and are able to make enough force. These transitional stages that lead to flight are both physicial and behavioral. The transitions over a hatchlings life can be correlated with the evolution of flight on a macro scale. If protobirds are compared to hatchlings their physical traits, such as wing size, and behavior may have been similar. Flapping flight is limited by the size and muscle force of a wing. Even while using the correct model of aboreal or curosial, protobirds wings were not able to sustain flight but they did most likely gain the behaviors needed for the aboreal or curosial model like todays birds do when hatched. There are similar steps between the two.

Wing assisted incline running can also produce a useful lift in babies but is very small compared to that of juvinilles and adult birds. This lift was found responsible for body acceleration when going up an incline and leads to flight as the bird grows. This lift shows another transition state leading to flight.

https://en.wikipedia.org/wiki/Origin_of_avian_flight