In the wild, Freshwater Crocodiles will eat a variety of invertebrate and vertebrate prey, including crustaceans, insects, spiders, fishes, frogs, turtles, lizards, snakes, birds and mammals. Insects (both aquatic and terrestrial) appear to be the most common food item, followed by fish. Larger crocodiles tend to eat larger prey items, however the average size of prey for all Freshwater Crocodiles is generally small (mostly less than 2cm²). Small prey is usually obtained by a ‘sit-and-wait’ method, whereby the crocodile lies motionless in shallow water and waits for fish or insects to come within close range, before they are snapped up in a sideways action. However, larger prey like wallabies and waterbirds may be stalked and ambushed in a manner similar to that of the Saltwater Crocodile. Freshwater Crocodiles are known to be cannibalistic, with larger individuals sometimes preying on hatchlings. In captivity, hatchlings will feed on crickets and grasshoppers, while larger young eat dead baby mice and chopped adult mice.