STEPHEN J. KRASEMANN / SCIENCE PHOTO LIBRARY STEPHEN J. KRASEMANN / SCIENCE PHOTO LIBRARY
Barren Ground Caribou (Rangifer tarandus) bull in prime condition walking along river bed to escape insects. A member of the Porcupine Caribou Herd which migrates between Arctic National Wildlife Refuge (ANWR) and Yukon, Canada.
Model release not required. Property release not required.