Black-legged kittiwakes with their chicks at Middleton Island, Alaska (IMAGE)

Nagoya University

Black-legged kittiwakes with their chicks at Middleton Island, Alaska

Caption

Adult black-legged kittiwakes tend to their chicks at a breeding colony on Middleton Island, Alaska, where researchers experimentally raised the energy cost of flight in some birds during breeding. The study shows that birds paying higher energy costs to raise chicks migrate farther and breed more successfully the next year, but at a cost to their survival.

Credit

Jumpei Okado, Nagoya University

Usage Restrictions

Credit must be given to the creator.

License

CC BY

Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.