Bos taurus. Crow’s Nest Preserve. Elverson, PA.
Gray wolf (Canis lupus). Denali National Park, Alaska.
Beaver-gnawed tree enclosed in fencing. Crum Woods, Swarthmore, PA.
Beaver activity on riparian tree. Crum Woods, Swarthmore, PA.
Mounted pair of male elk (Cervus canadensis) with locked antlers. Delaware County Institute of Science in Media, Pennsylvania.
Virginia opossum (Didelphis virginiana) on road. Swarthmore, PA.
Pony eating greens. Ridley Creek State Park, Media, PA.
Pony licking another pony for salt. Edgemont, PA.
North American porcupine (Erethizon dorsatum) in a tree. Mohonk Mountain House, New Paltz, NY.
Black cat resting on bedding plants. Longwood Gardens, Kennett Square, PA.
Young sea lion (Zalophus wollebaeki). Isla Ferndandina, Galapagos.
Western lowland gorilla (Gorilla gorilla gorilla). Baraka (born 1992). Smithsonian National Zoo. Washington, D.C.
Human skulls, likely Incan, donated by Dr Isaac T. Coates who looted archaeological sites. Delaware County Institute of Science, Media, PA.
Skull of groundhog (Marmota monax). Unionville Pine Barren, Unionville, PA.
Coati (Nasua narica) eating mango. Guanacaste province, Costa Rica.
Coati (Nasua narica) eating mango. Guanacaste province, Costa Rica.
Allegheny woodrat (Neotoma magister). Female. Mammoth Cave, Kentucky.
Key deer (Odocoileus virginianus clavium). Blue Hole, Big Pine Key, Florida.
White-tailed deer (Odocoileus virginianus) at lily pond. Mohonk Mountain House, New Paltz, NY.
White-tailed deer (Odocoileus virginianus). The official state animal of Pennsylvania. Crum Woods, Swarthmore, PA.
California ground squirrel (Otospermophilus beecheyi) begging for food or water. Yosemite National Park, Yosemite, CA.
Pygmy raccoon (Procyon pygmaeus). Cozumel, Mexico.
Skull of a black rat (Rattus rattus). Santiago Island in the Galápagos.
Proboscis bats (Rhynchonycteris naso) roosting on a dead tree. Guanacaste Province, Costa Rica.
Proboscis bats (Rhynchonycteris naso) roosting on a dead tree. Guanacaste Province, Costa Rica.
Proboscis bats (Rhynchonycteris naso) roosting on a dead tree. Guanacaste Province, Costa Rica.
Eastern gray squirrel (Sciurus carolinensis) sunning on the roof of an insect hotel.
Eastern gray squirrel (Sciurus carolinensis) inside a pumpkin. Swarthmore, PA.
Eastern gray squirrel (Sciurus carolinensis) inside a pumpkin. Swarthmore, PA.
Variegated squirrel (Sciurus variegatoides) in tree. Guanacaste province, Costa Rica.
Sus scrofa domesticus (domesticated pig). Newtown Square, PA.
Eastern chipmunk (Tamias striatus). Mohonk Mountain House, New Paltz, NY.
Eastern chipmunk (Tamias striatus). Mohonk Mountain House, New Palz, NY.
Arctic ground squirrel (Urocitellus parryii). Denali National Park, Alaska.
American black bear (Ursus americanus). Lake Mohonk, New Paltz, NY.
Eastern american red fox (Vulpes vulpes fulvus). Hildacy Farm Preserve, Media, PA.
Vulpes vulpes (red fox) with mange. Ridley Creek State Park, Media, PA.
Galapagos sea lion (Zalophus wollebaeki) pup nursing. Isla Santiago, Galapagos.
Young Galápagos sea lion (Zalophus wollebaeki) on red sand beach. Isla Rábida, Galápagos.
Galápagos sea lion (Zalophus wollebaeki). Isla Rabida, Galápagos.
Galápagos sea lion (Zalophus wollebaeki) blowing bubbles. Isla Fernandina, Galápagos.