For the vast majority of birds, a nest is a temporary structure ... their long pointed bills to chisel a small cavity into what is usually dead wood of a tree. It often takes upward of a week ...

He and his colleagues determined that cavity nesters — birds that build their nests in holes in structures like trees and cliffs ... snakeskin seemed to deter small mammals like mice ...

“The loss of the Johnson City nest tree is a small reflection of the mass destruction ... and build the largest nests of any North American bird, experts say. The eagles would sit on the egg ...

Dreys are shaggy masses of leaves nestled against a tree trunk or cupped in a fork of branches 20 to 40 feet above the ground ...