Sceloporus undulatus is an omnivore that eats mainly beetles (in the spring months), ants (in the summer months) and plant matter in lesser amounts throughout the active season. Their diets show slight variations based on both season and sex. Females eat more during both spring and summer, presumably because of the costs of bearing young (Johnson,1966). Predators include numerous bird species and other lizards, such as Crotaphytus collaris (Angert et al., 2002).
Angert, A. L., Hutchison, D., Glossip, D., & Losos, J. B. 2002. Microhabitat use and thermal biology of the collared lizard (Crotaphytus collaris collaris) and the fence lizard (Sceloporus undulatus hyacinthinus) in Missouri glades. Journal of Herpetology 36: 23-29.
Johnson, D. R. 1966. Diet and estimated energy assimilation of three Colorado lizards. American Midland Naturalist 76: 504-509.
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