Anaxyrus debilis

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Green toad
Bufo debilis insidior1.jpg
Western green toad, Anaxyrus debilis insidior
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Anura
Family: Bufonidae
Genus: Anaxyrus
Species: A. debilis
Binomial name
Anaxyrus debilis
(Girard, 1854)
Anaxyrus debilis range map.png

Bufo debilis Girard, 1854
Bufo insidior Girard, 1854

Anaxyrus debilis, also known with its old name Bufo debilis, is a species of toad found in the southwestern United States in the states of Arizona, New Mexico, Colorado, Kansas and Texas, as well as in northern Mexico in the states of Tamaulipas, San Luis Potosí, Durango and Zacatecas. Its common name is green toad (with many variants thereof).[2]


Green toads are typically bright to pale green in color, with black spotting.[3] They are not large toads; adult males are about 37–46 mm (1.5–1.8 in) in snout–vent length and females 44–54 mm (1.7–2.1 in).[4]

Habitat and reproduction[edit]

Green toads are relatively widespread and at least locally common.[1] They are secretive, however, only readily found during and immediately after periods of rainfall; their habitat is semi-arid and often very dry. Breeding occurs from late March to August, stimulated by summer rains. Males move from drier, terrestrial habitat to aquatic breeding sites where they form choruses. Females are attracted by chorusing males. Breeding aggregations do not usually last long, only a few days.[4]


Two subspecies, originally described as separate species, can be identified,[2][3][4] but this distinction is disputed:[2]

  • Eastern green toad, Bufo debilis debilis
  • Western green toad, Bufo debilis insidior

See also[edit]

  • European green toad (Bufo viridis), a species which is only distantly related, but shares the same common name.


  1. ^ a b "Anaxyrus debilis". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. 2004. Retrieved 24 May 2014. 
  2. ^ a b c Frost, Darrel R. (2014). "Anaxyrus debilis (Girard, 1854)". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. Retrieved 24 May 2014. 
  3. ^ a b Northern Prairie Wildlife Research Center (2013). "Green Toad, Bufo debilis". Checklist of Amphibian Species and Identification Guide. U.S. Geological Survey. Archived from the original on 25 May 2014. Retrieved 24 May 2014. 
  4. ^ a b c "Anaxyrus debilis". AmphibiaWeb: Information on amphibian biology and conservation. [web application]. Berkeley, California: AmphibiaWeb. 2014. Retrieved 24 May 2014.