The harpy eagle surely justifies a nomination as the world’s most powerful eagle.

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Published in The Wilson Journal of Ornithology (Vol. 138, No. 3, 2026)

In a new study of European bird species, participants picked the Eurasian Blackbird’s serenade as the most pleasing thanks to acoustic qualities that seem to have universal appeal.

By studying chickadee cognition in the wild, researchers learned smarter birds stay smart in old age, produce more young and have better gut bacteria.

An extremely well preserved fossil feather could reveal why some birds survived the dinosaur-killing asteroid, and others did not.

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The Wilson Ornithological Society’s library was founded in 1930.

Stress during egg-laying and chick rearing significantly impacts egg quality and reproductive success. This stress can be transmitted from parents to offspring through hormones, adversely affecting em...