Ascaphus montanus: Rocky Mountain Tailed Frog

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They are 2.5-5cm long. Coloration usually matches the rocks they live in, can be brown, gray, green, red or yellow. They have a triangle on nose and a darkish eye stripe. Males have a ‘tail’ which is actually the male reproductive organ. They have granular roughish skin. Recent evidence has separated this species from Ascaphus truei and a separate GAP map has not been made. In Washington State are found in the Blue Mountains of eastern Washington. They are mainly found in Rocky forest streams; prefer fast moving clear water, rarely found away from water and only on really wet nights.

Their breeding season is in the fall and eggs are laid in the Spring/Summer. Eggs are laid in strings underneath big rocks. Tadpoles have a large sucker mouth to cling to rocks in fast water streams. They can take 4-5 years for tadpoles to complete metamorphosis. One of the longest living species of frogs, they can live up to 15-20 years! They are one of the only frogs in the world that have internal fertilization. Males do not vocalize, possibly because the females cannot hear calls over fast moving water in streams. They have reduced lungs (breathe mostly through skin) which helps to limit buoyancy in water. Fingertips are hardened like claws to help move around in the rocks on the fast moving water.

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