The massive annual spring migration of America's birds – millions of them – is underway. Here's how to follow along at home.

Watching a bird fly across your yard ... In addition to keeping your heating and cooling costs down, these options will also help protect birds. While people can see right through the reflective ...

To test this, she needs the bird to fly the length of the tunnel, which he is stubbornly refusing to do. Suddenly he lets out a chirp, and I watch the green dot flit down the tunnel, pause at the ...

To fly, birds need to be lightweight ... Most of these ideas can be divided into two main theories – the ground-up theory and the trees-down theory. The ground-up theory suggests that fast, ...

In North America, birds typically fly south for the winter before food ... not location, generally up or down a mountain. Think of the Rocky Mountains and birds such as Clark's nutcracker, the ...