Geology topics
C.R. Schwalbe
Publications and source records attributed to C.R. Schwalbe.
Reproduction in a Sonoran Desert population of the desert tortoise (Gopherus agassizii)
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Bullfrog impacts on sensitive wetland herpetofauna and Herpetology of San Bernardino National Wildlife Refuge
No abstract available at this time
Ecology of the Mexican rosy boa and the Ajo Mountain whipsnake. Report to AGFD Heritage Program, Phoenix
No abstract available.
Hibernaculum use by a population of desert tortoises (Gopherus agassizii) in the Sonoran Desert
No abstract available.
Geographic Distribution. Serpentes. Lampropeltis triangulum
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Introduced aquatic vertebrates in the Chiricahua region: effects on declining native ranid frogs
No abstract available at this time
Health studies of free-ranging Mojave desert tortoises in Utah and Arizona
No abstract available at this time
Disappearance of the Tarahumara frog
In the spring of 1983 the last known Tarahumara frog in the United States was found dead. Overall, the species seems to be doing well in Mexico, although the decline of more northern populations are of concern. The Tarahumara frog ( Rana tarahumarae ) inhabits seasonal and permanent bedrock and bouldery streams in the foothills and main mountain mass of the Sierra Madre Occidental of northwestern Mexico. It ranges from northern Sinaloa, through western Chihuahua and eastern and northern Sonora, and until recently into extreme south-central Arizona (Fig. 1). Arizona localities, all in Santa Cruz County, include three drainages in the Atascosa-Pajarito Mountains (Campbell 1931; Little 1940; Williams 1960) and three in the Santa Rita Mountains (Hale et al. 1977).
The Endangered Species Act at twenty: An analytical survey of Federal endangered species
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Preliminary report on effect of bullfrogs on wetland herpetofaunas in southeastern Arizona
No abstract available at this time