The sounds oC black-tailed, white-tailed, and Gunnison's prairie dogs were studied in Colorado and \Yyoming from February, 1964 to June, 1966. Observations, photographs, and tape recordings were made in the field and were supplemented by data collected from captive prairie dogs. The sounds were tape-recorded on a battery-powered tape recorder at 15 inches per second and analyzed on a sound spectrograph. An unidirectional dynamiC microphone was used with the recorder. [...]
Waring, G.H.: SOUNDS OF BLACK-TAILED, WHITE-TAILED, AND GUNNISON'S PHAIRIE DOGS