User:Brandyedmonds.93/sandbox

Added one sentence and citation on this page: https://en.wikipedia.org/wiki/Flightless_bird "Flying birds have different wing and feather structures that make flying easier, while flightless birds' wing structures are well adapted to their environment and activities, such as diving in the ocean. [5]" Elliott, K. "High flight costs, but low dive costs, in auks support the biomechanical hypothesis for flighlessness in penguins.". PNAS.

Added three suggestions to this page: https://en.wikipedia.org/wiki/Penguin "Under the evolution section of this page, the flightlessness of penguins can be elaborated upon. One of the most complete penguin fossils was discovered in Peru, and shows resemblance to modern day penguin wings. It also showed adaptations to the feathers that were adapted for aquatic life. Also, the wing structure of penguins allows them to excel in swimming, but would make flying very difficult. They have larger, heavier bones and more feathers which would weigh down the penguins and make it hard to fly. It could also be added that the penguins lost any ability to fly simply because they no longer needed it anymore. They may not have had any predators that they would have to fly away from, therefore they became adapted for swimming instead"