Anaxyrus woodhousii — Woodhouse's Toad
The genus Anaxyrus was split from Bufo by Frost et al in 2006. This split is particularly controversial among herpetologists, and many references still use the long-established Bufo.
Subspecies I've seen:
A. w. australis
Southwestern Woodhouse's Toad
Anaxyrus woodhousii australis — Southwestern Woodhouse's Toad
My wife and I encountered several of these toads near the San Pedro river. They were all young toadlets, only an inch or so long. I'm not confident that I've identified them correctly; a friend believes that they are probably Red-spotted Toads (Anaxyrus punctatus), but they really don't look like that species to me. At least one other correspondent also thinks they look like red-spotted toads, but to me the head looks too thick and the parotid glands look too large for these to be A. punctatus. If you have any further information, please send me email.
I am not certain that this is a Woodhouse's Toad rather than a Great Basin Toad. Normally I should be able to tell them apart from the pattern of light and dark patches, and the colors of those patches, but this toad has just emerged from underground and is covered with so much dirt that its appearance when clean is not easy to determine. The snout shapes and parotid gland shapes of the two species are also a little different, and I think this one looks a little more like Woodhouse's, but I could very well be wrong. (Both species can be found in this area.)
- Behler, J. L., King, F. W. 1979. The Audubon Society Field Guide to North American Reptiles & Amphibians
- Brennan, T. C. and Holycross, A. T. 2006. A Field Guide to Amphibians and Reptiles in Arizona
- Crother, B. I. (ed.) 2012. Scientific and Standard English Names of Amphibians and Reptiles of North America North of Mexico, with Comments Regarding Confidence in Our Understanding. SSAR Herpetological Circular 39:1-92.
- Elliott, L., Gerhardt, C. and Davidson, C. 2009. The Frogs and Toads of North America
- Stebbins, R. C. 2003. Peterson Field Guide to Western Reptiles and Amphibians, Third Edition