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American Bison bull (Bison bison) in the grasslands of the Rocky Mountain Arsenal National Wildlife Refuge Colorado with the Rocky Mountains towerin
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Western Meadowlark (Sturnella neglecta) singing while perched on a clump of grass in the Rocky Mountain Arsenal National Wildlife Refuge Colorado US
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Great Blue Heron (Ardea herodias) on the waters edge at the Rocky Mountain Arsenal National Wildlife Refuge Colorado USA; Colorado United States o
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Canada Goose (Branta canadensis) swimming with its mirror image reflection in a still pond in the Rocky Mountain Arsenal National Wildlife Refuge Col
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Black-tailed Prairie Dog (Cynomys ludovicianus) chewing on a blade of grass in the Rocky Mountain Arsenal National Wildlife Refuge Colorado USA; Col
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Female White-tailed Deer (Odocoileus virginianus) bounding through dry grass with all four feet off the ground at the Rocky Mountain Arsenal National
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Herd of Bison (Bison bison) resting and grazing in the Rocky Mountain Arsenal Wildlife Refuge near Denver Colorado USA; Colorado United States of A
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Bison (Bison bison) grazing in a snowy meadow at the Rocky Mountain Arsenal National Wildlife Refuge near Denver Colorado USA; Colorado United Stat
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Bison (Bison bison) standing in an open meadow with the Denver skyline and the Rocky Mountains in the background at the Rocky Mountain Arsenal Nationa
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Starlings (Sternus vulgaris) line up on the back of a Bison (Bison bison) in the Rocky Mountain Arsenal National Wildlife Refuge near Denver Colorad
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Starlings (Sternus vulgaris) line up on the back of a Bison (Bison bison) in the Rocky Mountain Arsenal National Wildlife Refuge near Denver Colorad
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Large White-tailed Deer (Odocoileus hemionis) buck in the Rocky Mountain Arsenal Wildlife Refuge near Denver Colorado USA; Colorado United States o
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White-tailed Deer (Odocoileus hemionis) buck in the Rocky Mountain Arsenal Wildlife Refuge near Denver Colorado USA; Colorado United States of Amer
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Very large Mule Deer buck (Odocoileus hemionis) walking in a grass field in the Rocky Mountain Arsenal Wildlife Refuge near Denver Colorado USA; Col
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black-tailed prairie dog
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Bare trees and winter-brown grass at the Rocky Mountain Arsenal National Wildlife Refuge near Denver Colorado USA; Colorado United States of Americ
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Two bull Bison (Bison bison) at Rocky Mountain Arsenal National Wildlife Refuge near Denver Colorado USA; Colorado United States of America Photo
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American bison (Bison bison)
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Bison bull (Bison bison) in the Rocky Mountain Arsenal Wildlife Refuge near Denver Colorado USA; Colorado United States of America Photo by Kennet
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Young White-tailed Deer (Odocoileus virginianus) buck chasing a doe during the fall rut in the Rocky Mountain Arsenal Wildlife Refuge near Denver Col
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coyote (carnivore Canis latrans)
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coyote (carnivore Canis latrans)
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Two large Mule Deer bucks (Odocooileus hemionis) sparring during the fall rut in the Rocky Mountain Arsenal Wildlife Refuge near Denver Colorado USA
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Two large Mule Deer bucks (Odocooileus hemionis) sparring during the fall rut in the Rocky Mountain Arsenal Wildlife Refuge near Denver Colorado USA
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Two large Mule Deer bucks (Odocooileus hemionis) sparring during the fall rut in the Rocky Mountain Arsenal Wildlife Refuge near Denver Colorado USA
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Two large Mule Deer bucks (Odocooileus hemionis) standing side by side at the Rocky Mountain Arsenal National Wildlife Refuge near Denver Colorado U
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Widow Skimmer dragonfly (Libellula luctuosa) with its wings spread in the Rocky Mountain Arsenal National Wildlife Refuge Colorado USA; Colorado Un
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white-tailed deer (Odocoileus virginianus)
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Two White-tailed Deer bucks (Odocoileus virginianus) face off during the fall rut in the Rocky Mountain Arsenal Wildlife Refuge near Denver Colorado
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Bison bull (Bison bison) in the Rocky Mountain Arsenal Wildlife Refuge near Denver Colorado USA; Colorado United States of America Photo by Kennet
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Very large Mule Deer buck (Odocoileus hemionis) in the Rocky Mountain Arsenal Wildlife Refuge near Denver Colorado USA; Colorado United States of A
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Lake Ladora Colorado United States
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black-tailed prairie dog
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black-tailed prairie dog
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Mule Deer buck (Odocoileus hemionis) on a snowy hillside in the Rocky Mountain Arsenal National Wildlife Refuge; Colorado United States of America P
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Black-tailed Prairie Dog (Cynomys ludovicianus) standing on the edge of its mound in the Rocky Mountain Arsenal National Wildlife Refuge; Colorado Un
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Black-tailed Prairie Dog (Cynomys ludovicianus) performing jump-yip behaviour at top of its mound in the Rocky Mountain Arsenal National Wildlife Refu
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Black-footed ferret (Mustela nigripes) at the Rocky Mountain Arsenal National Wildlife Refuge Colorado USA by Elisa DahlbergUSFWSSCIENCE PHOTO
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Wildlife refuge Colorado USA
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Wildlife refuge Colorado USA
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The Rocky Mountain Arsenal National Wildlife Refuge in Denver Colorado USA Formerly a US Army facility for the production of chemical weapons th
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Three Burrowing Owls (Athene cunicularia) in Colorado
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