Abert's Squirrel Sciurus aberti
Woodland Lake Park, Lakeside, Navajo County, Arizona, July 2012.

American Beaver Castor canadensis
Fool Hollow Lake State Park, Show Low, Navajo County, Arizona, July 2012.


Antelope Ground Squirrel Ammospermophilus harrisi
Chiricahua Mountains, Cochise County, Arizona, December 2008.


Arizona Gray Squirrel Sciurus arizonensis
Ramsey Canyon, near Sierra Vista, Cochise County, Arizona, July 2010.


Bighorn Sheep Ovis canadensis
Imperial National Wildlife Refuge, Yuma County, Arizona, February 2006.


Black Bear Ursus americanus
Cave Creek Canyon, Chiricahua Mountains, Cochise County, Arizona, August 2012.


Black Giant Squirrel Ratufa bicolor
Khao Yai National Park, Thailand, January 2009.


Black-tailed Jackrabbit Lepus californicus
6 miles west off Animas, New Mexico, June 2010.


Black-tailed Prairie Dog Cynomys ludovicianus
Bosque del Apache N.W.R., Socorro County, New Mexico, August 2010.


Bobcat Lynx rufus
Chiricahua Mountains, Cochise County, Arizona, November 2008.


Brown Rat Rattus norvegicus
Bentsen-Rio Grande State Park, Hidalgo County, Texas, March 2013.


Brown-throated Sloth Bradypus variegatus
Santa Elena, Puntarenas, Costa Rica, April 2009.