Maria Cristina Tello-Ramos Neighboring groups of birds within the same species can create very different-looking nests — showing that their nest-building choices aren’t solely controlled by instinct ...

Have you ever seen a great blue heron nest or rookery? Find out where, when, and how these magnificent birds mate and raise ...

Ornithologists have theorized that birds first began to build nests when they were unable to locate natural cavities. Of the 470 perching (passerine) birds in North America, about 25 percent use holes ...

Neighboring groups of birds within the same species can create very different-looking nests — showing that their nest-building choices aren't solely controlled by instinct and the environment. Instead ...

A white-browed sparrow weaver inspects a roost under construction, after just receiving some grass brought by another member of its group. (Maria Cristina Tello-Ramos) Neighboring groups of birds ...