What functions do mix of feathers have in a tree swallow bird nest? Pa. researchers look for answers
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.
In an effort to help tree swallows find homes and successfully breed, one woman is encouraging Halifax residents to build and install nesting boxes on their properties. Jessica Ryuzaki said the idea ...
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