A porcupine nestles in a tree at National Elk Refuge

From USFWS National Wildlife Refuge System:

A porcupine nestles in a tree at National Elk Refuge (http://1.usa.gov/1vTBtJA). The refuge, 24,700 acres of intermountain valley in northwestern Wyoming, is bounded on the south by the town of Jackson, on the east by Bridger-Teton National Forest and on the north by Grand Teton National Park. Photo by U.S. Fish and Wildlife Service volunteer Tony Hough