Jurassic fossil from China rewrites history of bird evolution
Scientists have unearthed in southeastern China the fossil of a quail-sized bird that lived about 150 million years ago ...
National Audubon Society5h
Where Have All The Birds Gone?
Q: The amount of effort that goes into a Christmas Bird Count varies quite a bit across years and count circles. How do you deal with this issue when you calculate abundance trends? How do you know ...