woodhouse's toad (Phoenix Zoo - Arizona Trail)

woodhouse's toad

Anaxyrus woodhousii

Summary ⁷

The Woodhouse's Toad, (Bufo woodhousii) is a medium-sized (4 inches or 10 centimetres) true toad, which is native to the United States and Mexico. There are two recognized subspecies. The epithet woodhousii is in honor of the American physician and naturalist Samuel Washington Woodhouse.B. woodhousii tends to hybridize with Bufo americanus in their overlapping ranges.

Description ⁸

This species (Woodhouse's Toad) is large for a toad, with normally proportioned limbs and a blunt snout. Its paratoid glands are narrow, and spread apart by more than one (parotoid) length. Cranial crests run lengthwise from the front of the eyes to back edge of the eyes, then turn sharply towards the side of the toad and extend to the outside edges of the eyes. The warts are dark and small. Each wart has a red spot at its tip. The toad is olive green on its dorsal side, with dark splotches and a pale stripe down center of back. The underside is creamy and unmarked, while the throat is slightly darker in color.

Subspecies include Anaxyrus woodhousii australis (Southwestern Woodhouse's Toad), A. w. velatus (East Texas Toad) and A. w. woodhousii (Woodhouse's Toad or Rocky Mountain Toad).

The habitat of this toad overlaps the habitat of Anaxyrus americanus and Anaxyrus woodhousi fowleri. The eggs of A. woodhousi resemble those of A. fowleri, and adult A. woodhousi resemble adult A. americanus.

See another account at californiaherps.com.

Range description ⁹

This species is found throughout most of central and southwestern USA and portions of adjacent northern Mexico. It is absent from high mountains and the West Coast.

Iucn red list assessment ¹⁰

Red List Category

Least Concern

Red List Criteria

Version

3.1

Year Assessed

2004

Assessor/s

Geoffrey Hammerson, Georgina Santos-Barrera

Reviewer/s

Global Amphibian Assessment Coordinating Team (Simon Stuart, Janice Chanson, Neil Cox and Bruce Young)

Contributor/s

Justification

Listed as Least Concern in view of its wide distribution, tolerance of a broad range of habitats, presumed large population, and because it is unlikely to be declining fast enough to qualify for listing in a more threatened category.

Fuentes y créditos

(c) J. N. Stuart, algunos derechos reservados (CC BY-NC-ND), http://www.flickr.com/photos/21786539@N03/2709858751
(c) 2012 Todd Pierson, algunos derechos reservados (CC BY-NC), http://calphotos.berkeley.edu/cgi/img_query?seq_num=411102&one=T
Tree of Life web project, sin restricciones conocidas de derechos (dominio publico), http://tolweb.org/tree/ToLimages/Bufo_fowleri_nbii_m00005.jpg
(c) 2002 California Academy of Sciences, algunos derechos reservados (CC BY-NC-SA), http://calphotos.berkeley.edu/cgi/img_query?seq_num=110516&one=T
(c) 2010 California Academy of Sciences, algunos derechos reservados (CC BY-NC-SA), http://calphotos.berkeley.edu/cgi/img_query?seq_num=315271&one=T
(c) 2009 James H. Harding, algunos derechos reservados (CC BY-NC), http://calphotos.berkeley.edu/cgi/img_query?seq_num=271473&one=T
(c) Wikipedia, algunos derechos reservados (CC BY-SA), http://en.wikipedia.org/wiki/Anaxyrus_woodhousii
(c) AmphibiaWeb © 2000-2011 The Regents of the University of California, algunos derechos reservados (CC BY), http://eol.org/data_objects/23849723
(c) International Union for Conservation of Nature and Natural Resources, algunos derechos reservados (CC BY-NC-SA), http://eol.org/data_objects/27996789
(c) International Union for Conservation of Nature and Natural Resources, algunos derechos reservados (CC BY-NC-SA), http://eol.org/data_objects/27996788