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Red Spotted Toad

Anaxyrus punctatus (Baird & Girard 1852)

Description

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This small toad (ranging from 38-76 mm total length) is described as having a flattened, short sub-triangular head with a pointed snout. It is the only North American toad that has small, round parotoid glands the same size as the eye plus weak or absent cranial crests (Korky 1999). The coloration is gray or light to medium brown, with reddish to orangish warts and a white ventral stripe; sometimes the stripe has spotting (Conant and Collins 1991; Stebbins 1985) . Korky (1999) also states, "this species is the only North American toad with round parotoids about the same size as the eye, and with cranial crests notabely weak or absent."Hybrids with other bufonid species have been found in nature (Sullivan 1990). Many late Pleistocene and Holocene fossils have been recovered for this species at numerous sites in Nevada, New Mexico, Arizona, California, Texas as well as in Sonora, Mexico (for complete references please see Korky 1999). Korky (1999) has provided a long literature list for this species. See another account at californiaherps.com (http://www.californiaherps.com/frogs/pages/a.punctatus.html).

References

  • Korky, J. K. (1999). ''Bufo punctatus.'' Catalogue of American Amphibians and Reptiles. Society for the Study of Amphibians and Reptiles, 689.1-689.5.
  • Storer, T. I. (1925). "A synopsis of the amphibia of California." University of California Publications in Zoology, 27, 1-342.
  • Sullivan, B. K. (1984). ''Advertisement call variation and observations on breeding behavior of Bufo debilis and Bufo punctatus.'' Journal of Herpetology, 18, 406-411.
  • Sullivan, B. K. (1990). ''Natural hybrid between the Great Plains Toad, Bufo cognatus and the Red-Spotted Toad, Bufo punctatus from Central Arizona, USA.'' Great Basin Naturalist, 50, 371-372.

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Distribution and Habitat

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In the USA, the northern extent of the range is from southeastern California east to southern Nevada, into Utah, Colorado and the southwestern region of the state of Kansas. It occurs as far south as the tip of the Baja California Penninsula, Mexico, and on the Mexican mainland, down to the state of Hidalgo (Stebbins 1985) . This toad lives in rough, rocky regions and open grasslands. It can be found near springs, seepages and persisting pools in the desert and in rocky crevices (Storer 1925; Conant and Collins 1991; Stebbins 1985) . This toad ranges in elevation from near sea level to 2,000 m (Stebbins 1985).
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Life History, Abundance, Activity, and Special Behaviors

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Like the other toads in this group, the red-spotted toad is an explosive breeder. The eggs are laid in early April and tadpoles metamorphose within a season. Males have melodious call and may form breeding choruses of 2-6 males. Males actively search for females as well (Sullivan 1984).
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Brief Summary

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This small, up to 3 inch (76 mm) long toad has round parotoid glands, a characteristic which distinguishes it from other toad species in the region. It tends to be whitish when found in association with limestone, light tan to red around volcanic rocks, to brown above, with scattered reddish tubercles (raised bumps); the underside is creamy white. Males have dark throats and single vocal sacs. The body and head are dorso- ventrally compressed, giving this toad a flattened appearance. A riparian inhabitant, this species is commonly encountered in and around rocky streams and arroyos. Its flattened body allows it to wedge into narrow rock crevices.

Reference

http://www.arizonensis.org/sonoran/fieldguide/vertibrata/amphibian.html

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Red-spotted toad

provided by wikipedia EN

The red-spotted toad (Anaxyrus punctatus), formerly Bufo punctatus, is a toad in the family Bufonidae found in the southwestern United States and northwestern Mexico.[1][2][3]

Description

It is a small toad species growing to 3.7 to 7.5 cm (1.5 to 3.0 in) in length. It has a flattened head and body, and a light grey, olive or reddish brown dorsum with reddish or orange skin glands. It has a whitish or buff venter with or without faint dark spotting, and round parotoid glands. The snout is pointed. The juvenile toad looks similar to the adult, but has more prominent ventral spotting and the undersides of its feet are yellow. The male red-spotted toad has a dusky throat and develops nuptial pads during the breeding season.[4]

It may hybridize with the western toad (Anaxyrus boreas) in some locations, possibly with other toad species too.[3] It is docile and easily handled with little or no skin gland secretions.[4]

A red-spotted toad in the Patagonia Mountains of southeastern Arizona.

Distribution and habitat

This toad is native to the southwestern United States and northwestern Mexico, especially Baja California. It occurs primarily along rocky streams and riverbeds, often in arid or semi-arid regions. It is very localized on the coastal slope, but widespread in the deserts. In dry areas it needs seasonal pools or even temporary rain puddles to use for breeding. Eggs hatch in three days and the tadpole can transform in 6–8 weeks, taking advantage of the ephemeral water bodies. It spends dry periods in burrows or beneath rocks or moist plant matter, and becomes suddenly active during rainfall when multitudes of individuals emerge.[5]

References

  1. ^ a b IUCN SSC Amphibian Specialist Group (2021). "Anaxyrus punctatus". IUCN Red List of Threatened Species. 2021: e.T54739A53950671. doi:10.2305/IUCN.UK.2021-3.RLTS.T54739A53950671.en. Retrieved 2 December 2022.
  2. ^ Frost, Darrel R. (2016). "Anaxyrus punctatus (Baird and Girard, 1852)". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. Retrieved 31 January 2016.
  3. ^ a b "Anaxyrus punctatus". AmphibiaWeb: Information on amphibian biology and conservation. [web application]. Berkeley, California: AmphibiaWeb. 2016. Retrieved 31 January 2016.
  4. ^ a b Robert Fisher & Ted J. Case. "Anaxyrus punctatus Red-Spotted Toad". A Field Guide to the Reptiles and Amphibians of Coastal Southern California. U.S. Geological Survey. Retrieved 31 January 2016.
  5. ^ Grismer, L. L. (2002). Amphibians and Reptiles of Baja California. Los Angeles: University of California Press, 71.
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Red-spotted toad: Brief Summary

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The red-spotted toad (Anaxyrus punctatus), formerly Bufo punctatus, is a toad in the family Bufonidae found in the southwestern United States and northwestern Mexico.

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