Davidson : Frog and Toad Calls of the Rocky Mountains :

| | | Audio-CD, Booklet, 28 S mit Illustrationen und detaillierten Informationen zu den einzelnen Arten. | WG: Bioakustik-Produkt | Stimmen von 38 Frosch- und Krötenarten der Rocky-Mountains-Staaten, Yukon, der Northwest Territories, Alberts, Saskatchewans, Montana, Idahos, Wyomings, Colorados, Utahs, Nevadas, Arizona und New Mexicos. | An audio guide identifying 38 species of frogs and toads that occur in the Rocky Mountains and Southwestern states and provinces; Yukon, Northwest Territories, Alberta, Saskatchewan, Montana, Idaho, Wyoming, Colorado, Utah, Nevada, Arizona, and New Mexico. Each of the species has a unique voice which can be used to identify it. Includes an audio test section and a detailed booklet with illustrations. The one hour cassette is accompanied by a 28 page booklet with descriptions of calls, breeding season, and breeding habitats for each species; as well as information on the different types of frog calls, on learning and identifying calls, and on the use of sound by biologists. | [E] | |