This not only confuses would-be predators, but also the blood is mixed with a chemical that is foul-tasting to canine predators such as wolves, coyotes, and domestic dogs. This novel behavior is observed to be very effective in defense.

 

Diet and decline :

 

About 70% of the Texas horned lizard's diet is made up of harvester ants, though they supplement these with termites, beetles, and grasshoppers. In recent years, the species has declined by about 30% of its range, though it may be making a comeback. The decline is usually blamed on overuse of pesticides and the spread of nonnative, highly aggressive and fiercely territorial red imported fire ants. Both eradicate harvester ant colonies, destroying the lizard's principal source of food. The Texas horned lizard is now a protected species, and, in Texas, it is illegal to take, possess, transport or sell them without a special permit.

 

Current research :

 

Horned lizards are primarily studied by researchers at Texas Christian University, the nearby Fort Worth Zoo, and Dallas Zoo[8] with raw data and fieldwork done by state employees. Since 2010, the Dallas Zoo has been conducting a mark-and-recapture study on Texas horned lizards[9] on the Rolling Plains Quail Research Ranch, a 4,700-acre preserve located in Fisher County, Texas. Dallas Zoo researchers capture animals, tag them, collect data, and release them.[10] The project’s goals are aimed at shedding light on the life history, population density, and determining ecological conditions best suited for this threatened species. Further research toward their preservation is funded by sale of horned lizard "Keep Texas Wild" license plates.[11]

 

In addition, the Dallas Zoo and Houston Zoo are currently working to establish a captive colony[12] of animals with several key reproductive successes taking place in 2015.

 

Temperament :

 

Despite its fierce appearance, Texas horned lizards are extremely docile creatures. Since they have very few natural predators, they are not at all aggressive. Captured horned lizards lie completely limp in a human's hand or pocket, playing dead, so they made excellent pets before they were threatened. Today, in Texas, it is illegal to disturb or keep this lizard without a state permit.

 

The Texas horned lizard is a sunbather, and requires bright sunlight to produce vitamin D. Deprived of sunlight, the animal is unable to produce vitamin D and can suffer from vitamin deficiency. So, horned lizards are most often found along the side of roads or other open, rocky areas, where they can lounge and take in sunlight.

 

At night, the lizard buries itself in sand.[13]

 

Otherwise, horned lizards are most often found near harvester ant hills. Although they prefer to move very little, horned lizards can move quite fast if they feel a predator is in the area, and dart into thick grass and foliage to escape. Horned lizards are also excellent diggers, and can quickly burrow underground to escape threats.

 

Genetic mutation :

 

Research aimed at preservation has revealed the Texas horned lizard is extremely genetically diverse, and isolated pockets of genetically distinct subspecies have been found throughout Texas. Though each of these subspecies is physically identical to all other subspecies, they are likely specifically adapted for the region in which they are found. This makes it difficult to know how one subspecies would survive if it were reintroduced into a new area.