Birds are rapidly vanishing from North America, with dramatic population losses in places that were once thought safe.

“Scientists once believed that only animals who were vocal learners — like humans and parrots — could learn to find a beat,” said Hugo Merchant, a researcher at Mexico’s Institute of Neurobiology, who ...

By analyzing the arrangement of vertebrae in the spines of nearly 400 species of tetrapods—a group of animals with four limbs ...