Behavior of a predator and its prey: the horned lizard (Phrynosoma cornutum
) and harvester ants (Pogonomyrmex spp.).
Movements, home ranges, and survival of Texas horned lizards (Phrynosoma cornutum).
Physiological responses to temperature in the horned lizards, Phrynosoma cornutum and Phrynosoma douglassii.
Ants are the main source of both moisture and energy for Phrynosoma cornutum (cf.
Phrynosoma cornutum depends on camouflage and sedentary behavior to avoid predation (Pianka & Parker 1975; Rissing 1981).
First, intensive surveys in 1993 for Phrynosoma cornutum
(Busby et al., 1994) resulted in the located of only three individuals, all in sparsely vegetated uplands.
has distinctly longer occipital spines than P.
. -- "Rio Grande, west of San Antonio" (Cope 1900:435).
getula), and Texas horned lizard (Phrynosoma cornutum
) as reptiles to monitor.
-- A survey to assess the status of the Texas horned lizard (Phrynosoma cornutum
) in Texas was conducted in 1992.
Previous studies have examined how foraging by the Texas horned lizard, Phrynosoma cornutum
, may be influenced by rates of harvest of ants (Munger, 1984).
In the dunes of Tamaulipas, the reptile fauna includes four lizards (six-lined racerunner, Texas horned lizard Phrynosoma cornutum
, glass lizard Ophisaurus incomptus, and northern keeled earless lizard Holbrookia propinqua), a snake (western ribbon snake Thamnophis proximus), and a turtle (Texas tortoise Gopherus berlandieri).
We were unable to confirm presence of several species that are common in the Chihuahuan Desert (e.g., Phrynosoma cornutum
and Heterodon nasicus), which occur just east and south of the Rincon Mountains, but not to the west.
The breeding habits of the Texas horned toad, Phrynosoma cornutum
. American Naturalist 60:546-551.
Although most herpetofauna appear to avoid direct impacts of fire (Means and Campbell, 1981; Floyd et al., 2002), there are concerns that hibernating reptiles in southern Texas, such as the Texas horned lizard (Phrynosoma cornutum
), might suffer direct mortality from management activities, including prescribed fire (Fair and Henke, 1997).