Tree swallow nests across Pennsylvania are being collected for an investigation into the patterns that the common, fast-flying, cavity-nesting birds might incorporate into their nest construction.

Placement, construction, shape and material are essential nest considerations. Each species meets its own needs with its own style, developed over eons. Many bird species employ feathers in their ...

NORTH CENTRE TWP. – Lauri Green nestled into her lawn chair and pointed binoculars at the house of a new family. The home, Nest Box 26, contained four tree swallows born nine days earlier. The birds’ ...