Once abundant in the Southern Rocky Mountains, the boreal toad is a rare sight today.
U.S. Forest Service biologist Kelly Larkin hikes into the Colorado high country, in search of boreal toads.
Doreen Sumerlin observes tadpoles in a high mountain pond.
Brock McCormick and Doreen Sumerlin swab a boreal toad for evidence of chytridiomycosis.
With a grip around the female’s chest, a male boreal toad fertilizes the thousands of eggs she produces.
A toad jumps through tall wetlands vegetation; female toads have been observed to travel more than a mile from their breeding ponds