This is my slowly growing list of mammal species I have positively identified over the course of my life. |
Arctic Ground Squirrel

|
| Barbary Macaque |
| Beaver |
| Bighorn Sheep |
| Black Bear |
| Black Howler Monkey |
| Black-tailed Jack Rabbit |
| Black-tailed Prairie Dog |
| Blue Whale |
| Bottlenose Dolphin |
| Buffalo |
| California Ground Squirrel |
| California Sea Lion |
Caribou

|
Central American Agouti

|
Central American Wooly Opossum

I first saw these incredible marsupials on Isla Bastimentos, Panama. |
| Collared Peccary |
| Common Possum |
| Cougar |
| Columbia Plateau Ground Squirrel |
Coyote

|
| Coypu (Nutria) |
Dall's Porpoise

|
| Desert Cottontail Rabbit |
| Desert Kangaroo Rat |
| Douglas Squirrel |
Eastern Fox Squirrel

|
| Eastern Gray Squirrel |
| Eastern Red Squirrel |
| Elephant Seal |
| Elk |
| Golden-mantled Ground Squirrel |
| Gray Fox |
| Gray Whale |
| Harbour Porpoise |
| Harbour Seal |
| Hawaiian Monk Seal |
| Harris' Antelope Squirrel |
| Hopi Chipmunk |
| Humpback Whale |
| Kit Fox |
| Lesser White-lined Bat |
| Long-beaked Common Dolphin |
| Long-nosed bat |
Mantled Howler Monkey

|
Marsh Rabbit

|
| Mink |
| Moose |
Mule Deer

|
Musk Ox

I wrote about my encounter with a male muskox in Midnight Road to Beringia. |
| Northern Fur Seal |
| Northern Raccoon |
Orange Nectar-Feeding Bat

Photographed near El Valle de Anton, Panama. |
| Pacific White-side Dolphin |
Panamanan Night Monkey

|
Pronghorn

Photographed while on the Loneliest Road in Nevada. |
Red-eared Agouti

|
| Red Fox |
| Red Squirrel |
| Red Tailed Squirrel |
| River Otter |
| Rock Squirrel |
Round-tailed Ground Squirrel

|
| Sea Otter |
| Spider Monkey |
| Spotted Seal |
| Stellar's Sea Lion |
| Striped Hog-Nosed Skunk |
| Tapeti |
| Tayra |
Three-toed Sloth

|
| Thirteen-Lined Squirrel |
| Townsend's Chipmunk |
| Two Toed Sloth |
| Variegated Squirrel (Pacific subspecies) |
| Water Opposum |
| Western Pipistrelle Bat |
| Western-Spotted Skunk |
| White Sackwing Bat |
White-faced Capuchin

Photographed in Soberania National Park. |
| White-nosed Coati |
| White-tailed Antelope Squirrel |
| White-tailed Deer |
| Yellow-bellied Marmot |