Geckos primarily eat insects and other small invertebrates. Most gecko species, including leopard, African fat-tailed, tokay, house, flying, cave, and frog-eyed geckos, are insectivores and prefer a diet consisting of crickets, mealworms, waxworms, earthworms, fruit flies, moths, and grasshoppers. Some adult geckos may also eat pinkie or infant mice occasionally

. Certain gecko species, such as crested, gargoyle, chahoua, day, and mourning geckos, are frugivorous and eat fruit in addition to insects. These fruits can include papaya, pears, blueberries, mango, guava, cherries, pineapple, plums, grapes, apples, watermelon, and bananas, usually offered in pureed form about once a week

. In the wild, geckos have a varied diet that can also include spiders, worms, scorpions, caterpillars, small reptiles, and even small rodents or young birds for larger species

. For pet geckos, it is recommended to feed them live, gut-loaded insects to ensure proper nutrition, and dust the prey with calcium powder to supplement their diet. Water should also be provided for drinking and soaking

. In summary, geckos mainly eat:

• Live insects such as crickets, mealworms, waxworms, fruit flies, moths, and grasshoppers
• Some species also eat fruit (pureed or soft)
• Occasionally small rodents or other small animals for larger geckos
• Wild diets are more varied including spiders and small reptiles