Feeding ecology and diet

Gila monsters and beaded lizards are widely searching foragers that feed on the contents of vertebrate nests, primarily reptilian and avian eggs, and juvenile mammals. Among the most common food items are juvenile cottontail rabbits and rodents; snake and lizard eggs, especially those of the spiny-tailed

Gila Monster And Mexican Beaded
1. Mexican beaded lizard (Heloderma horridum); 2. Gila monster (Heloderma suspectum). (Illustration by Brian Cressman)

iguana (Ctenosaura pectinata) within the range of the beaded lizard; and quail eggs. Beaded lizards take a greater variety of food items. Gila monsters can fulfill their annual maintenance energy requirements with three large meals. Their relatively large size, low resting metabolic rate, and ability to take large meals make frequent foraging activity unnecessary for helo-dermatid lizards.

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