animals, animal, big, Blue Spiny Lizard, brush, fauna, wildlife, brown, canyons, Valley, Valleys, canyon, color, day, daytime, dry, Arid, behaviour, behavior, behaviors, branch, Branches, cliffs, Steep, cliff, deserts, desert, draker, dryness, females, female, full body, Full Length, grassland, grasslands, plains, Length, green, horizontal, hot, image, lizards, Lacertilia, lizard, log, logs, males, male, meadow, field, fields, meadows, Natural, natural world, nature, north america, american, pastures, nobody, one, one animal, outdoors, outdoor, photography, single, photo, portraits, portrait, reptiles, cold blooded, reptile, rio grande, rio grande valley, rgv, Sceloporus, south, scales, scale, Sceloporus serrifer, Sceloporus serrifer cyanogenys, south texas, southern united states, southwest, spines, spring, sunbathing, texas, southern, southwestern, Spiny, Spiny Lizard, Starr, Starr County, texan, Thermoregulating, Thermoregulation, sunbath, sunning, time, usa, United States, america, vertebrates, vertebrate, wild