In his landmark paper from 1958, MacArthur described how five species of wood warbler that live in the same trees and were thought to be "ecologically equivalent" could actually coexist by ...

There are Three Willow Warbler Sub-Species. The differences in the three wood warbler sub-species involve slight variations in plumage – with centrally located birds being browner and eastern ...

The top 10 declines the RWBS registered, in its own order of magnitude, were: tree pipit, hawfinch, willow tit, willow warbler, lesser spotted woodpecker, lesser redpoll, wood warbler, redstart ...

Wood warblers are among our tiniest forms of birdlife. Surprisingly plentiful, more than 30 species — such as this Nashville warbler — may pass through Iowa by the time the autumn migration is ...

Lipshutz’s federally-funded team focused on five families of birds: swallows, wood warblers, sparrows, thrushes and wrens, and on two closely related species per family — one an obligate ...

But much like other bird species, warbler populations are declining. A 2019 study published in Science found there are nearly 3 billion fewer birds in North America compared to 1970.

A new study used modern methods to reassess a foundational study in biology that explained how ecologically similar species of wood warblers coexist. The research team examined foraging behavior ...