Alpine swifts fly nonstop for more than six months
The birds eat and rest without touching the ground
LONG FLIGHTS An alpine swift lives on the wing. Researchers logged the birds taking nonstop flights that lasted more than six months.
D. Occiato
The birds eat and rest without touching the ground
LONG FLIGHTS An alpine swift lives on the wing. Researchers logged the birds taking nonstop flights that lasted more than six months.
D. Occiato