About Sceloporus jarrovii Cope, 1875
Sceloporus jarrovii Cope, 1875, commonly referred to as S. jarrovii, grows to a snout-to-vent length of 10.5 cm (4.1 in). It has keeled scales, a crosshatch-patterned torso, and coloration that includes tints of pink, green, blue, and copper. The top of its head is dark gray; males have a blue throat and blue belly. This species can be distinguished from similar lizards by a complete black collar with a white inferior border. The nominate subspecies S. j. jarrovii occurs in Arizona and New Mexico in the United States, and in the Mexican states of Chihuahua, Durango, Sonora, northern Tamaulipas, and western Zacatecas. The subspecies S. j. lineolateralis is found only in Mexico, in the states of Durango and Zacatecas. The preferred natural habitats of S. jarrovii are forest and rocky areas. Its habitat in the Mule Mountains of Arizona is shrinking due to climate change. This shrinkage may lead to the species being designated and protected under the U.S. Endangered Species Act of 1973, a status that is pending the result of litigation. S. jarrovii is viviparous, meaning it gives birth to live young.
