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Juvenile Boreal Toad
Bufo boreas boreas
39.6344, -105.711
Field Notes
Description:
Adults are around 4 inches while juveniles are around an inch. Adults have a white or cream dorsal stripe, and is dusky gray or greenish dorsally with skin glands concentrated within the dark blotches. Its parotoid glands are oval, widely separated, and larger than the upper eyelids. It has a mottled venter and horizontal pupils but lacks cranial crests.
Compared to females, males have smoother skin, reduced dorsal blotching, and nuptial pads (thickened skin) on their forefeet during breeding season.
In juveniles of this species, the dorsal stripe is weak or absent. Large young have prominent dorsal and ventral spotting and yellow/ orange feet.
Habitat:
Mountainous areas of northwestern North America, ranging from sea level to elevations near or above regional treeline, or 10,000 feet in elevation. In Colorado it can be from about 7,000 feet to 11,860 feet . In the mountains of Colorado, the largest toad populations usually occur from about 9,500 feet to 11,000 feet elevation.
Notes:
Juvenile found near a small mountain stream above 10,000 ft. Maybe higher.
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