The hoiho, or yellow-eyed penguin, is thought to be one of the world's rarest penguin species.

Rare Yellow-Eyed Penguin Wins New Zealand's Bird of the Year Contest

The noisy-but-shy bird, known as the hoiho, has earned the most votes for a second time amid threats to its survival

Construction of the famous stone statues of Rapa Nui, called moai, was previously thought to have contributed to the island's population collapse.

Easter Island's Ancient Population Never Faced Ecological Collapse, Suggests Another Study

New DNA analysis adds to growing research indicating the famous Pacific island did not collapse from overuse of resources before the arrival of Europeans

American redstarts and magnolia warblers were thought to fly together merely by coincidence, but new research suggests they might be forming a social relationship.

Birds Form Surprising Relationships With Other Avian Species During Migration, Study Suggests

New research indicates that birds are not alone while migrating—and sharing space with other species may even help them on the journey

Japanese eels use burrowing and swimming motions to move around the seafloor—and to escape from inside the stomach of a predator.

Watch Eels Make a Great Escape From a Fish's Stomach After Being Swallowed Alive

For the first time, scientists witnessed Japanese eels free themselves from the stomach of a predatory fish in X-ray video footage

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