Marten

The Marten (often called the pine marten or American marten) is a weasel that lives in trees. Males are about two feet long, with an eight inch tail, and they weigh about 1 1/2 pounds. Females are 10 to 20 percent smaller than the males, and weigh only half as much as the male. The […]

Read More

Mink

The mink is a large, brown, semi-aquatic weasel. Males are 20 – 24 inches long, females about one-fifth smaller. Mink are dark brown, slightly more pale beneath, with the tip of the tail nearly black. Their toes are partially webbed. The mink is a large, brown, semi-aquatic weasel. Males are 20 – 24 inches long, […]

Read More

Mountain Goat

The mountain goat, like the moose, was introduced deliberately to Colorado, to expand hunting opportunities. The first such introduction was in 1947. In 1993 the Colorado Wildlife Commission proclaimed the mountain goat a native species. However, most professional biologists doubt that the animals ever occurred in Colorado naturally. Some early travelers reported goats in Colorado, […]

Read More

Mountain Lion

The mountain lion is called by more names than any other Colorado mammal – cougar, puma, panther, catamount or just plain lion – and all connote respect for such a magnificent hunter. Colorado’s largest cat, adult mountain lions are more than six feet long, with a graceful, black-tipped tail 32 inches long. They weigh 130 […]

Read More

Porcupine

The porcupine is familiar to nearly everyone. Second in size only to the beaver among Colorado rodents, porcupines are 27 to 32 inches long (of which ten inches is tail). Weighing up to 33 pounds, these are large mammals. The porcupine is familiar to nearly everyone. Second in size only to the beaver among Colorado […]

Read More

Raccoon

Raccoons need no introduction. With their ringed, bushy tail, yellowish brown fur (with a blackish wash) and black face mask, they are unmistakable. Adults are two to three feet long (one third of which is tail) and weigh eight to 22 pounds (heaviest in the autumn). Raccoons walk flat on their feet, as humans do, […]

Read More

Skunk

Four species of skunks are known in Colorado: striped, eastern and western spotted, and hog-nosed. The striped skunk (24 to 32 inches long, weighing to nine pounds) is the largest and most widespread. Four species of skunks are known in Colorado: striped, eastern and western spotted, and hog-nosed. Sometimes skunks are considered to be their […]

Read More

White-tailed Ptarmigan

The White-tailed Ptarmigan is the only bird to permanently reside in the alpine zone. This zone includes rocky areas, krummholz, snowfields, and meadows. The White-tailed Ptarmigan is the smallest of the ptarmigans and the smallest bird in the grouse family. Adults are 11.8 to 12.2 inches (30 to 31 cm) long, with the males being […]

Read More

Wolverine

Wolverines are three feet long, with a rather short tail, just one-quarter the total length. Otters are longer, but wolverines are the heaviest of weasels, tipping the scale at 20 to 30 pounds or more. They are stocky mammals, built like a small bear. Their fur is dark brown to black, and the sides have […]

Read More

Yellow Bellied Marmot

The yellow bellied marmot is the largest of our ground squirrels, a close relative of the woodchuck of the East and Midwest. The yellow-bellied marmot is a heavy-set, brown grizzled animal with white areas on the chin and (as the name suggests) a yellowish belly. Marmots can be waddling fat in the fall, and their […]

Read More