They eat insects, larvae, earthworms, grubs, rodents, lizards, salamanders, frogs, snakes, birds, moles, and eggs. Grubs and maggots are also excellent bait when trout fishing. White grubs and aphids are the major insect pests. Grubs and maggots are also considered excellent bait when trout fishing. Caterpillars, grubs, and larvae are also consumed in rarity. Examples include the maggots of flies or grubs of weevils. Kiwi eat small invertebrates, seeds, grubs, and many varieties of worms. Its diet consists of invertebrates (such as beetle grubs, earthworms, and caterpillars), fruits, and berries. Skunks commonly dig holes in lawns in search of grubs and worms. The larvae are legless grubs, tapering at both ends. The larvae (called white grubs) feed on the roots of grasses and other plants. The grubs of another start life inside caterpillars, and eat the unsuspecting hosts. The large bill is used in order to extract grubs and larvae from rotting wood. In most species, larvae are whitish grubs, roughly oval and bluntly-pointed at both ends. The larvae, known as "white grubs" or "chafer grubs", hatch after four to six weeks.