Modern birds are the living relatives of dinosaurs. Take a look at the features of flightless birds like chickens and ostriches that walk upright on two hind legs, or predators like eagles and hawks ...

Some species that breed over large geographic areas can still be adapted to a fairly narrow range of climates, making them more vulnerable to climate change than previously thought. Also, species with ...

How big brains and flexible skulls led to the evolution of modern birds 3D modeling shows how larger brains triggered changes in jaw muscles and joint mechanics that powered a flexible feeding system ...