Intraspecific variation in the diet of the Mexican garter snake .

The Mexican Garter Snake ( is a terrestrial-aquatic generalist that feeds on both aquatic and terrestrial prey. We describe size-related variation and sexual variation in the diet of through analysis of 262 samples of identifiable stomach contents in snakes from 23 locations on the Mexican Plateau. The snake we studied consumed mostly fish, followed in lesser amounts by leeches, earthworms, frogs, and tadpoles.