Is the greater Sage-grouse endangered?

Residential building and energy development have caused the greater sage-grouse population to decline from 16 million 100 years ago to between 200,000 and 500,000 today. This species is in decline due to loss of habitat; the bird's range has shrunk in historical times, having been extirpated from British Columbia, Kansas, Nebraska, Oklahoma, Arizona, and New Mexico. Though the greater sage-grouse as a whole is not considered endangered by the IUCN, local populations may be in serious danger of extinction. In May 2000, the Canadian Species at Risk Act listed the Centrocercus urophasianus phaios, formerly found in British Columbia, as being extirpated in Canada. The presence of subfossil bones at Conkling Cave and Shelter Cave in southern New Mexico show that the species was present south of its current range at the end of the last ice age, leading some experts to project that the species could become increasingly vulnerable as global climate change increases the humidity in semiarid regions.