The Texas Horned Lizard (Phrynosoma coronatum) occurs across parts of the western United States and Mexico. Its range in the U.S. includes Texas, as well as parts of Oklahoma and New Mexico. It was formerly a fairly common reptile in much of its range, but it has declined significantly in the past 25 years. Much of this decline is thought to be due to pesticide use as well as the introduction of Fire Ants. The individuals in the top three shots on this page were photographed in Kenedy Co., Texas in April, 2002, with a Canon EOS 1V and EF 300mm F/4 L IS lens and 1.4X extender. The 4th shot was in Hidalgo Co., Texas, in May, 2006, and was taken with a Canon EOS 1D Mark II and EF 300mm F/4 L IS lens.