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New modeling studies suggest that birds migrate to strike a favorable balance between their input and output of energy.
The neuroscientist Erich Jarvis found that songbirds’ vocal skills and humans’ spoken language are both rooted in neural pathways for controlling learned movements.
Scientists are exploring a mysterious pattern, found in birds’ eyes, boxes of marbles and other surprising places, that is neither regular nor random.
Modern birds emerged in a snap of evolutionary time through a series of simple genetic changes.
Despite swapping DNA through interbreeding, butterflies and other animals can maintain distinct species.
A large new study of ovenbird lineages questions the extent to which competing species push each other to evolve.