Nice P.cornutum. Must be nice to see so many. There are a few locals in AZ where these guys are quite abundant.
They are difficult in captivity, but they can do well if you put the time and learning into their care.
Regarding modestum, my experience is that they will tend to be at and slightly up the bases of the hills surrounding valleys where you might find cornutum. They love to bask on rocks in the morning sun.
-----
www.phrynosoma.org
www.phrynosoma.com


