Sounds of Bufo alvarius - Sonoran Desert Toad

(=Ollotis alvaria)

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Advertisement Calls

An advertisement call is the most well-known call of a toad. It is produced by a male during the breeding season to attract females of his own species. It can also serve an agressive function to defend his calling site by warning rival males of his presence. Toads usually make the calls around bodies of water that are suitable for breeding and egg laying. These calls can be heard during the evening and at night, and sometimes during daylight at the peak of the breeding season.

The call of the Sonoran Desert Toad is a weak, low-pitched whistling screech, 1/2 - 1 second in duration. Calls are made at night around standing water, following summer rains.

This is a 3 second recording of two advertisement calls of a distant Sonoran Desert Toad. Great Plains Toads and insects are heard in the foreground. The duration between calls has been shortened.

This is a 53 second unedited recording of the advertisement calls of a distant group of Sonoran Desert Toads, made at night in Pima County, Arizona. One toad can be heard in the foreground with more in the background. A cacophony of Great Plains Toads and insects is heard in the foreground.

Waveform and Sonogram

This is a recording of one repetition of the advertisement call of a male Colorado Desert toad calling at night in Pima County, Arizona. A large group of Great Plains Toads can be heard in the background. The image on the right is a visual representation of this call, along with Great Plains toads. Click on it to see a larger image. Click here for information about how to read the waveform and sonogram images.

You can listen to more recordings of Sonoran Desert Toads on this cd:

Carlos Davidson - Frog and Toad Calls of the Pacific Coast - Cornell Laboratory of Ornithology

and on the cd that comes with this book:

Lang Elliott, Carl Gerhardt, and Carlos Davidson - The Frogs and Toads of North America - Houghton Mifflin Harcourt.

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