Often seen as a lemon-colored blur among leafy treetops, the American yellow warbler is challenging to view with binoculars or capture with a camera. Patience and a bit of luck make it worth the ...

In early June, efforts to find migrant song birds center on several rarer ones that are known to be late-spring migrants.

A new study shows that one group of Galápagos yellow warblers responds to intruders more aggressively than others. It adds ...