In many bird species, the eggs in a clutch don’t necessarily hatch at the same time, creating a hierarchy of size within broods.
Tag: the auk
If you’re a predator that eats baby birds — say, an American Crow — eavesdropping on the begging calls of nestlings can be an easy way to find your next meal.
Every museum has its “greatest hits” tour — those specimens steeped in museum lore that you show off to visitors.
In ancient Chinese mythology, cranes were said to carry the souls of the dead to paradise.
Different raptor species in the Arctic nest at least 700 to 1,800 meters apart — except for the Rough-legged Hawk.
Global warming is increasingly affecting wild bird populations, and because the Arctic is warming more rapidly than any other part of the world, populations of Arctic migratory birds are potentially the most vulnerable.
Dialects, a well-known feature of human languages, can also be found in the vocalizations of various bird species.
Reproduction and migration are the two most demanding tasks in a bird’s life, and the vast majority of species separate them into different times of the year.
Few groups of organisms possess striking visual displays that rival the bright colors and intricate patterns of bird feathers.
There’s no shortage of studies demonstrating that conditions during one part of birds’ annual of breeding and migration cycle can affect individuals in subsequent stages — a phenomenon known as carry-over effects.