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The Pygmy Rabbit, Brachylagus idahoensis is a North American rabbit, and is one of only two rabbit species in America to dig its own burrow. The Pygmy Rabbit differs significantly from species within either the Lepus or Sylvilagus genera and is generally considered to be within the monotypic genus Brachylagus. Although it is listed as an endangered species in the Columbia Basin of the United States, the IUCN lists the species as lower risk. This is because the Columbia Basin population is a genetically distinct isolated relict population well on its way to evolving into a distinct subspecies, whereas the IUCN only considers species as a whole.
The Pygmy Rabbit is the smallest leporid in North America, with mean adult weights from 375 to about 500 grams (0.8 to 1.1 pounds), and a body length from 23.5 to 29.5 centimeters (9¼ to 11½ inches); females are slightly larger than males. The pygmy rabbit is distinguishable from other leporids by its small size, short ears, gray color, small hind legs, and lack of white fur on the tail.
The Pygmy Rabbit is typically found in areas of tall, dense sagebrush (Artemisia spp.) cover, and are highly dependent on sagebrush to provide both food and shelter throughout the year. The historic distribution of the Pygmy Rabbit included much of the semi-arid, shrub steppe region of the Great Basin and adjacent intermountain zones of the conterminous western United States, and included portions of Montana, Idaho, Wyoming, Utah, Nevada, California, Oregon, and Washington.
The last male purebred Columbia Basin Pygmy Rabbit, found only in Douglas County, Washington, died March 30, 2006, at the Oregon Zoo in Portland. A crossbreeding program conducted by the Oregon Zoo, Washington State University and Northwest Trek is attempting to preserve the genetic line by breeding surviving females with the Idaho Pygmy Rabbit. [1]
September 26, 2007 U.S. District Judge Edward Lodge granted litigant party Western Watersheds Project summary judgement remanding the United States Fish & Wildlife Service\'s "90-Day Finding" denying conservationist parties\' Listing Petition. The petition sought legal protection for Pygmy Rabbit as "Endangered" or "Threatened". [2]
The decision orders U.S. Fish & Wildlife Service to prepare a new 90-day Finding within 90 days of the Summary Judgement.
| Extant Lagomorpha species (family Leporidae) | |
|---|---|
| Kingdom: Animalia · Phylum: Chordata · Class: Mammalia · Infraclass: Eutheria · Superorder: Euarchontoglires | |
| Pentalagus | Amami Rabbit (Pentalagus furnessi) |
| Bunolagus | Riverine Rabbit (Bunolagus monticularis) |
| Nesolagus | Sumatran Striped Rabbit (Nesolagus netscheri) · Annamite Striped Rabbit (Nesolagus timminsi) |
| Romerolagus | Volcano Rabbit (Romerolagus diazi) |
| Brachylagus | Pygmy Rabbit (Brachylagus idahoensis) |
| Sylvilagus | Subgenus Tapeti: Swamp Rabbit (Sylvilagus aquaticus) · Tapeti (Sylvilagus brasiliensis) · Dice\'s Cottontail (Sylvilagus dicei) · Omilteme Cottontail (Sylvilagus insonus) · Marsh Rabbit (Sylvilagus palustris) · Venezuelan Lowland Rabbit (Sylvilagus varynaensis) Subgenus Sylvilagus: Desert Cottontail (Sylvilagus audubonii) · Manzano Mountain Cottontail (Sylvilagus cognatus) · Mexican Cottontail (Sylvilagus cunicularis) · Eastern Cottontail (Sylvilagus floridanus) · Tres Marias Rabbit (Sylvilagus graysoni) · Mountain Cottontail (Sylvilagus nuttallii) · Appalachian Cottontail (Sylvilagus obscurus) · Robust Rabbit (Sylvilagus robustus) Subgenus Microlagus: Brush Rabbit (Sylvilagus bachmani) · San Jose Brush Rabbit (Sylvilagus mansuetus) |
| Oryctolagus | European Rabbit (Oryctolagus cuniculus) |
| Poelagus | Bunyoro Rabbit (Poelagus marjorita) |
| Pronolagus | Natal Red Rock Hare (Pronolagus crassicaudatus) · Jameson\'s Red Rock Hare (Pronolagus randensis) · Smith\'s Red Rock Hare (Pronolagus rupestris) |
| Caprolagus | Hispid Hare (Caprolagus hispidus) |
| Lepus | Subgenus Macrotolagus: Antelope Jackrabbit (Lepus alleni) Subgenus Poecilolagus: Snowshoe Hare (Lepus americanus) Subgenus Lepus: Arctic Hare (Lepus arcticus) · Alaskan Hare (Lepus othus) · Mountain Hare (Lepus timidus) Subgenus Proeulagus: Black-tailed Jackrabbit (Lepus californicus) · White-sided Jackrabbit (Lepus callotis) · Cape Hare (Lepus capensis) · Tehuantepec Jackrabbit (Lepus flavigularis) · Black Jackrabbit (Lepus insularis) · Scrub Hare (Lepus saxatilis) · Desert Hare (Lepus tibetanus) · Tolai Hare (Lepus tolai) Subgenus Eulagos: Broom Hare (Lepus castrovieoi) · Yunnan Hare (Lepus comus) · Korean Hare (Lepus coreanus) · Corsican Hare (Lepus corsicanus) · European Hare (Lepus europaeus) · Granada Hare (Lepus granatensis) · Manchurian Hare (Lepus mandschuricus) · Woolly Hare (Lepus oiostolus) · Ethiopian Highland Hare (Lepus starcki) · White-tailed Jackrabbit (Lepus townsendii) Subgenus Sabanalagus: Ethiopian Hare (Lepus fagani) · African Savanna Hare (Lepus microtis) Subgenus Indolagus: Hainan Hare (Lepus hainanus) · Indian Hare (Lepus nigricollis) · Burmese Hare (Lepus peguensis) Subgenus Sinolagus: Chinese Hare (Lepus sinensis) Subgenus Tarimolagus: Yarkand Hare (Lepus yarkandensis) Subgenus incertae sedis: Japanese Hare (Lepus brachyurus) · Abyssinian Hare (Lepus habessinicus) |
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