Caribou, Arctic National Wildlife Refuge, Alaska, USA
Muskox, Arctic National Wildlife Refuge, Alaska
Muskox, Arctic National Wildlife Refuge, Alaska
Closeup of an eagle in Montezuma National Wildlife Refuge
Caribou, Arctic National Wildlife Refuge, Alaska, USA
Caribou, Arctic National Wildlife Refuge, Alaska, USA
Snowshoe hare, Arctic National Wildlife Refuge, Alaska
Caribou, Arctic National Wildlife Refuge, Alaska, USA
Arctic ground squirrels, Arctic National Wildlife Refuge, Alaska
Wildflowers growing in the Arctic National Wildlife Refuge, Alaska, USA.
Waterfowl on the restored marshes of Sacramento National Wildlife Refuge, California
Panoramic view of the ponds of Sacramento National Wildlife Refuge, California
Caribou migrate through the Arctic National Wildlife Refuge, Alaska, USA
A walking path passing the ponds at Nevada's Pahranagat National Wildlife Refuge
Closeup of a Cinnamon Teal duck flying at Bear River National Wildlife Refuge
A flock of snow geese wintering on a pond in Sacramento National Wildlife Refuge, California
Tall reed grasses and marshes in Columbia National Wildlife Refuge, Washington, USA.
Waterfowl wintering on the ponds of Llano Seco Unit, Sacramento National Wildlife Refuge, California
A translucent shard of aufeis reaches toward the arctic sky, Arctic National Wildlife Refuge,
Waterfowl wintering on the ponds of Llano Seco Unit, Sacramento National Wildlife Refuge, California
Snow geese, Bosque Del Apache National Wildlife Refuge, New Mexico, USA
Western Meadowlark singing on barbed wire fence post in the Malheur National Wildlife Refuge
Sunset view of the wetlands of San Luis National Wildlife Refuge, Merced County, California
Large group of snow geese during sunrise at Bosque del Apache National Wildlife Refuge
Sandhill cranes, Grus canadensis, Bosque del Apache National Wildlife Refuge, New Mexico, USA
Wooden bridge and cabin landscape, Don Edwards San Francisco Bay National Wildlife Refuge, Fremont
Prairie
Prairie
Prairie
Wildfire on the Bayou
