Roundtail Horned Lizard Phrynosoma modestum Seen one evening on the road. Eddy County, NM. June 2004. Pinkish looking modestum. Hidalgo County, NM. May 2007. Camouflage. Luna County, NM. August 2011. Pretty common to see these guys sunning on a dirt road in the morning. Socorro County, NM. June 2012. The highest elevation I've seen a modestum at: over 6,500 ft. on a steep slope. Socorro County, NM. April 2013. A dark gray adult. Socorro County, NM. May 2013. Dark animal soaking up the morning sun on a prickly pear. Luna County, NM. August 2013. On a road to the Chiricahuas. Cochise County, AZ. May 2018.