The size and shape of a bird’s beak usually give a person an idea of what it eats and how it catches what it eats. Birds such as cardinals have strong, conical bills that crack open nuts and seeds.
Around 45 million years ago, a 4.6-foot-tall (1.4 meters) bird called Diatryma roamed a warm, tropical swamp in what is now southern Saxony-Anhalt, Germany. This giant, flightless bird, known for its ...
Our two pieces of recent research identified that, in response to warming, more than 100 species of Australian birds have developed smaller bodies and bigger beaks over time. When we talk about ...