BEST ANIMAL PHOTOS OF 2017-Goose

After hunting, a Nazca booby returns to its nest near a thicket of prickly pear cacti on Isla Wolf. Scientists have been studying the birds elsewhere on the islands to gauge how long-term changes in their fish diet may hurt reproduction and depress populations.

PHOTOGRAPH BY THOMAS P. PESCHAK, NATIONAL GEOGRAPHIC

Best animal photos 2017 NATGEO