Compressed from .wav format into .mp4 delivery format
J. Willard Marriott Library, University of Utah, Salt Lake City, Utah 84112; Ecological and animal data provided by NatureServe. NatureServe Explorer: An online encyclopedia of life [web application]. NatureServe, Arlington, Virginia. Available http://www.natureserve.org/explorer
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. Great Plains Toads and insects are in the foreground.