I ❤ Cliff Swallows

Cliff Swallows are known to build small mud huts on cliffs for their young to mature in. Because of the increasing urbanization of our planet the Swallows have made a habit of building their huts underneath bridges. Scientists have been drooling over the "Jaw dropping" drop in Swallow deaths around roadways in the last 30 years. After delving deeper into this conundrum, they have also found the wing span on cliff Swallows to have also dropped drastically..... about the size of a Tic Tac. They have also found that the dead Swallows have ad slightly longer wings. So the conclusion is that the Cliff Swallows have adapted to the copious amounts of traffic by shortening their wings through natural selection so that dodging cars is much easier. So here it is, a shining example of Darwin's theory happening right in front of our faces, and right in our country....The incredibly wonderful United States of America.

http://www.sciencenews.org/view/generic/id/349028/description/Shorter-winged_swallows_evolve_around_highways