The only species of toad in Alaska is the western toad.

Among the amphibians in trouble is the western toad, found from the Rockies to the Pacific.

She can't risk using the remaining western toads for her preliminary experiments - their population is too fragile.

There are two known subspecies of the western toad:

Body temperature of western toads is closely correlated with the substrate temperature.

Female western toads at least 10 to 11 years of age have been reported.

In the mountains of Colorado, the largest western toad populations usually occur from about 9,500 feet to 11,000 feet (2,896-3,353 m) elevation.

Populations of western toads have very limited dispersal, particularly in rugged terrain.

In locations where there is little or no hiding cover, western toads may spend most of the day in the water.

Under more humid conditions, western toads may become active during the day.