Alan Murphy/ BIA / Clay-colored Thrush (Turdus grayi) feeding on berries, Texas

Donald M. Jones / Clay-colored Sparrow (Spizella pallida), Montana

Piotr Naskrecki / Straw-colored Fruit Bat (Eidolon helvum) group roosting, Maputo, Mozambique

Pete Oxford / Osborne's Lancehead (Bothrops osbornei) juvenile showing differently colored tail tip used for caudal luring, native to South America

Alan Murphy / Clay-colored Thrush (Turdus grayi) and Great Kiskadee (Pitangus sulphuratus) pair fighting, Texas

Alan Murphy / Clay-colored Thrush (Turdus grayi) feeding on berries, Texas

David Noton / Canoes on the moored on the Nam Song River at Vang Vieng, Laos, March 2009.

Chris & Monique Fallows / Sooty Albatros (Phoebetria fusca) at sea off South Georgia Island, Antarctica

Jack Dykinga / White Sands National Park with its white gypsum dunes dotted with Yuccas (Yucca elata) creating patterns amid the dunes, at sunset. White Sands, New Mexico. January 2013

Michael Pitts / Bicolour parrotfish (Cetoscarus bicolor) sleeping at night, Red Sea.

Tim Fitzharris / Looking up at blue sky through a canopy of fall colored Aspen trees, Colorado

Tim Fitzharris / Fallen autumn colored Aspen leaves on the ground covered in dew droplets, Colorado