What is the call of Fowler's Toad?

"Waaaaaaaaaaa" is the call of Fowler's Toad (Bufo fowleri, Anaxyris fowleri).

Specifically, the voice of Fowler's Toad is a nasal buzzy trill. The call lasts about 1-5 seconds. The sound is likened to that of a crying baby or a kind of wailing scream. The calls may be heard during April and May.