These birds have a circumpolar range that stretches ... For starters, there’s the burrowing owl. Their hissing sound is ...

An analysis of 140,000 vocalizations from 77% of bird species showed that beak size and geography play a big role in the way ...

A heart-shaped white facial disk is a characteristic that sets the American barn owl apart from other owls. Bird sounds courtesy of the Cornell Lab of Ornithology These birds have very different ...