The lesser prairie chicken is a species in the grouse family. It is a medium to large bird, striped white and brown, slightly smaller and paler than its near relative the greater prairie chicken. Adults range from 15.0-16.1 in in length and 22.1-28.7 oz in weight. About half of its current population lives in western Kansas, with the other half in the sandhills and prairies of western Oklahoma, the Texas Panhandle including the Llano Estacado, eastern New Mexico, and southeastern Colorado. Like its larger relative, it is known for its lekking behavior. Considered "vulnerable" by the IUCN due to its restricted and patchy range, it is vulnerable to habitat destruction. There is evidence suggesting that global warming may have a particularly detrimental influence by greatly reducing the size of the sagebrush ecosystem. Subfossil remains are known, e.g., from Rocky Arroyo in the Guadalupe Mountains, outside the species' current range but where more habitat existed in the less humid conditions in the outgoing last ice age. Range contraction apparently took place no later than about 8000 BC. The United States Department of the Interior proposed creating a LesserPrairie Chicken Preserve as a National Monument, but action was never taken action on the proposal. On March 27, 2014, the lesser prairie chicken was listed as threatened under the Endangered Species Act but the listing was vacated in 2015 following a legal challenge and the bird's status remains uncertain. In 2015, Senator Jerry Moran introduced an amendment to legislation authorizing construction of the Keystone XL Pipeline that would overturn the listing. He disputed the listing as, "... another example of unnecessary intrusion into private lives and businesses by the federal government." His action is supported by the American Energy Alliance, and opposed by the League of Conservation Voters. When the Senate voted on the Keystone bill, it did not get the 60 votes in favor that was required to pass. It got only 53 Republican and one Democratic Senator to vote in favor.
