Fall 2013: Highway Interchange Bridge Work
Painted Desert Traffic Interchange (I-40 Exit 311) may be closed for construction. Check here for updates from Arizona Department of Transportation (ADOT): More »
Nov. 2012-July 2013, due to bank error credit cards may not have been charged for your entrance fee
...due to a bank error credit cards may not have been charged for your entrance fee, even if you received a receipt from the entrance station. The error was corrected on Sept. 26th, 2013. We apologize for any inconvenience this may have caused.
Photo by Marge Post/NPS
Well-adapted to the often dry environment of Petrified Forest National Park, reptiles play an important part in maintaining the health of the ecosystem. Over sixteen varieties of lizards and snakes make Petrified Forest their home. Reptiles occupy a variety of habitats ranging from grassland to rocky slopes. They consume large quantities of insects, spiders, scorpions, other reptiles and small mammals thereby preventing infestations of any single species. Respecting the entire reptile community helps to preserve this vital link.
All reptiles are "ectothermic," or cold-blooded, regulating body temperature via external sources rather than internal metabolism. The metabolic rate of a reptile is very low, but so are its energy needs. Keeping warm in the Arizona sunshine does not require much work, so energy generated can be used for reproduction and finding food instead of for heating and cooling. Of course, there are limitations to this type of adaptation. Since they cannot pant or sweat, reptiles are not able to endure extremely high temperatures without shade. They also cannot endure freezing temperatures. When it is cold, they hibernate or enter into an inactive torpor.
The following is a list of the reptiles known to occur in the park. Help protect this important park ecosystem by observing our reptile inhabitants from a distance.
Lampropeltis getula Common Kingsnake
Lampropeltis triangulum Milksnake
Masticophis taeniatus Striped Whipsnake
Pituophis catenifer Gophersnake
Thamnophis cyrtopsis Black-necked Gartersnake
Aspidoscelis pai Pai Striped Whiptail (formerly A. inornatus Little striped whiptail)
Aspidoscelis neomexicana New Mexico Whiptail
Aspidoscelis velox Plateau Striped Whiptail
Crotaphytus collaris Eastern Collared Lizard
Holbrookia maculata Common Lesser Earless Lizard
Phrynosoma hernandesi Greater Short-horned Lizard (formerly P. douglasii Short-horned lizard)
Sceloporus graciosus Sagebrush Lizard
Sceloporus tristichus Plateau Lizard (formerly S. undulatus Eastern fence lizard)
Uta stansburiana Common Side-blotched Lizard
Terrapene ornata Ornate Box Turtle
Check out this interesting website: 'What Snake Is That?' at http://www.whatsnakeisthat.com. "The core aim of this educational website is to provide a public resource which enables residents to become familiar with the main species of snakes found in their local area, while also giving an insight into these remarkable creatures."
Did You Know?
Petrified wood was so abundant when the ancestral Puebloan people were living in the area that they used it not only for stone tools but also as building material, such as the "brick" used in Agate House at Petrified Forest National Park.