same individual as http://www.inaturalist.org/observations/623019
On Marathon ISD running track.
Bosque del Apache NWR, Socorro Co., New Mexico, USA. Among creostotebush in Chihuahuan Desert habitat.
Phrynosoma modestum (Squamata: Lacertilia: Phrynosomatidae). Piedras Marcadas Canyon in Petroglyph National Monument, Bernalillo County, NM 13 April 2012
The roundtail horned lizard (Phrynosoma modestum) is one of the smaller species of horned lizard. Their specific epithet is from the Latin word modestum, meaning modest or calm. They are found in the United States, in western Texas, New Mexico eastern Arizona, southeastern Colorado and eight states in northcentral Mexico where they are referred to as "tapayaxtin".