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 ...

Common swifts are known for their impressive aerial abilities, capturing food and nest material while in flight. Now, by attaching data loggers to the birds, researchers reporting in the Cell Press ...

Swifts are among Britain's best loved birds and their annual arrival to our shores signals that summer is on the way. But their numbers are plummeting and they desperately need help. Each year, swifts ...

Alexander C. Lees is also affiliated with the Cornell Lab of Ornithology. The weather is warmer and the nights are lighter. What are those black, curved silhouettes looping in the sky? Assuming you ...