Frogs eat all kinds of food, not only flies and mosquitoes, but also pests such as stem borers, moles, leafhoppers and rice planthoppers. Frog larvae (tadpoles) can eat more than 100 dragonflies a day, and more than 70 pests a day when they are mature. A frog can eat 50-200 pests a day, about 15000 for seven months. Each frog can prey on pests as high as 1500 a year. ...