Before human structures became widespread, what natural sites did Phoebes likely use for nesting?

Answer

Rock outcrops, cliffs, and caves

The text indicates that before the proliferation of human structures like barns and bridges, Phoebes likely utilized natural sheltered sites such as rock outcrops, cliffs, and caves.

Before human structures became widespread, what natural sites did Phoebes likely use for nesting?
behaviorbirdanimalhumanPhoebe