Hummingbirds have the fastest metabolism of any animal. The tropical hummingbirds that live in the Andes Mountains in South America must expend considerable energy to maintain their high body ...

A migratory bird that almost never stops flying sometimes slips into a brief, hibernation-like state inside its nest during chilly breeding periods. When not breeding, the common swift (Apus apus), a ...

A team of researchers from the U.S. and South Africa has discovered that several species of hummingbirds living in the Andes drastically reduce their body temperatures during their nightly torpor. In ...

While people in the Northeast are the ones bearing the brunt of another snowstorm, the rest of the country is still experiencing winter weather. Parts of the Pacific Northwest and Northwest are ...

Hummingbirds’ metabolisms are so fast that they face an ever-looming threat­­: running out of energy and dropping dead. That’s why the birds evolved a physiological trick, an ability at the centre of ...

Their feathers, roosting behaviors and adaptability help birds survive the cold, “nature’s proving ground.” By Margaret Roach Winter mornings begin at David Sibley’s Deerfield, Mass., household as ...

image: Hummingbirds use the hibernation-like state of torpor in varying ways, depending on their physical condition and what is happening in their environment, according to new research from ...