Houston Toad vs. Woodhouse's Toad
Woodhouse's Toad (the East Texas form) shares the Houston Toad's breeding pools, and the two sometimes hybridise. A: Dark and heavily mottled, often with only a thin pale line down the back in the Houston Toad; a bold pale stripe down the back and big dark blotches in the Woodhouse's Toad. B: Thick, raised crests between the eyes in the Houston Toad; lower crests along the inner edge of the eye in the Woodhouse's Toad. Calls differ: the Houston Toad a long, high, tinkling trill; Woodhouse's a nasal 'waaah' like a bleating sheep.
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