Caption Female, left, and male Galapagos Yellow Warbler - picture by Caglar Akcay, Anglia Ruskin University ...

A female Galápagos yellow warbler falls asleep on her nest during a playback of cowbird calls, which usually provoke aggressive responses in mainland warblers. Researchers are realizing that ...

A willow warbler is a small, round bird with olive green top feathers and pale yellow feathers on the chest. It has pale legs and a stripe of yellow over each eye. It is around 4 – 4.9 inches ...

If the Kentucky warbler hadn’t gotten caught in the net, scientists may have never known that species was present at Tremont. The female warbler had a brood patch — an area of featherless skin ...

Swainson’s warblers have only been documented about 60 times in Pennsylvania since they were first recorded at Bear Run in 1975. Western Pennsylvania is at the most northern edge of its range.

This female Kentucky warbler was a rare find at the Tremont bird-monitoring station. Its capture this summer marked the first time the species had been collected at the site.