Traditionally, migratory birds are thought to arrive at their wintering grounds after fall migration and remain there until the spring migration back to breeding sites. This assumption forms the basis ...

According to BirdCast, ornithologists didn't realize the magnitude of migration that occurred at night until the turn of the 20th century. Fall migration timing varies across the U.S. and even within ...

I looked up on the last day of July at the sound of purple martins, and instead of a swirling flock of feeding birds, I saw a line of the giant swallows flying south toward their winter home, perhaps ...

A new study has identified unexpected shifts in animal migration patterns, raising important questions about habitat conditions, climate influences, food availability, and human impacts on wildlife.