Amargosa toad

Amargosa toad
Conservation status
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Anura
Family: Bufonidae
Genus: Bufo
Species: A. nelsoni
Binomial name
Anaxyrus nelsoni
Stejneger, 1893
Synonyms
  • Bufo boreas ssp. nelsoni Stejneger, 1893
  • Bufo nelsoni

The Amargosa toad (Anaxyrus nelsoni), previously known as Bufo nelsoni, is a species of toad in the Bufonidae family. It was at one time considered to be a subspecies of the Western toad. It is threatened by habitat loss and is classified by the IUCN as being "endangered".

Distribution and habitat

The Amargosa toad is endemic to the Oasis Valley in the Amargosa Desert in Nye County, Nevada, United States. Its natural habitat is along a 10-mile (16 kilometre) stretch of the Amargosa River in the Oasis Valley between Springdale and Beatty, in tributary springs and in nearby isolated springs. The riverside growth consists of cottonwoods, sedges and catstails and breeding takes place in the springs where there is often little aquatic vegetation.[1]

Status

The International Union for Conservation of Nature has assessed the status of the Amargosa toad as being "endangered". Factors that adversely affect it include variable amounts of rainfall, the increased use of off-road vehicles, the trampling of grazing animals, dredging operations for flood control and commercial development. Another threat is the introduction of non-native species that prey on it including catfish, crayfish and bullfrogs. The population of the toads is believed to be in decline.[1]

Effective steps are being taken by local citizens, ranchers, and farmers to preserve and restore the Amargosa toad's population in the area, in part to avoid federal intervention through the Endangered Species Act.[2]

References

  1. 1.0 1.1 1.2 Hammerson, G. (2004). Bufo nelsoni. 2006 IUCN Red List of Threatened Species. Downloaded on 21 July 2007.
  2. NPR: "All Hopped Up: Town Unites For Toad Revival", NPR. Accessed 11.10.2010

Pauly, G. B., D. M. Hillis, and D. C. Cannatella. (2004) The history of a Nearctic colonization: Molecular phylogenetics and biogeography of the Nearctic toads (Bufo). Evolution 58: 2517–2535.

External links