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.

A few years ago, Maria McNamara was invited to Brussels by fellow paleontologist Pascal Godefroit and presented with an intriguing opportunity. At the time, they were collaborating on a study of an ...

For sunbirds, all that shimmers is piping hot. The birds’ flashy, iridescent feathers heat up more than other types of feathers, possibly making it harder to stay cool in hot, sunny conditions. If so, ...

Each Canada goose that you see flying around in formation around Lancaster County these days has between 20,000 and 25,000 feathers, most hidden from sight. A typical songbird at your backyard feeder ...

It was the absence of feathers that got conservation biologist Thor Hanson thinking about the significance of them. Hanson was in Kenya studying the feeding habits of vultures, and he noticed the ...