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Texas Horned Lizard

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Tay Brooks-Parham

on 15 September 2016

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Transcript of Texas Horned Lizard

Texas horned lizards range from the south-central United States to northern Mexico, throughout much of Texas, Oklahoma, Kansas and New Mexico
Foraging Ecology
When Texas Horned Lizards are born, they're called hatchlings. From birth, they receive no parental care, so when they emerge, they start to hunt for food.
Phrynosoma cornutum
"Horny Toad"
Other Behavior
The Texas Horned Lizard, which aid in its survival. For example when an enemy approaches the lizard it will inflate itself, and if it is sufficiently frightened it can squirt up 1/3 of its volume of blood out of a pore near the eye
Texas Horned Lizard
Taylar Brooks-Parham
SCIN130 Biology
Assignment 5 Presentation
12 September 2016


During heavy rains the lizard will stand high on its feet, spread the body out flat, and lower the head so that falling rain will be funneled to the mouth through interscalar channels

“The breeding season begins in late April and continues into July" (Seymour 1996).
"These lizards are oviparous, and will lay their eggs in moist, sandy areas" (Bartlett 1999).
Egg laying starts a few weeks later, usually in late July and early August.
The farther north, the later the eggs are laid.
length is 3.5 to 5 inches
two prominent horns at the rear and center of the Scales
rows of spiky fringe scales on the side of the body
It's gray to brown to rust, with dark spots in rows down the back, a light central stripe, and dark lines radiating from the eye
Bartlett, P., R. Bartlett. 1999. A Field guide to Texas Reptiles and Amphibians. Houston Texas: Gulf Publishing Company.
Bergmann, Phillip J.,The Evolution of Positive Allometry of Weaponry in Horned Lizards (Phrynosoma), Evolutionary Biology 39-3, 311-323, 2012-09

Middendorf, G., W. Sherbrooke. 1992. Canid Elicitation of Blood-squirting in a Horned Lizard. Copeia: 519-527.

Seymour, G., A. Royo. 1996. "Desert USA" (On-line). Accessed September 22, 1999( http://www.desertusa.com/april96/du_hliz.html)
Tweit, Susan J., The Great Southwest Nature Factbook, 1992, Alaska Northwest Books, Anchorage.
Thank you!
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