A number of wild mammals subsist on insects, including anteaters, bats, moles and shrews. Only hedgehogs and sugar gliders, though, are routinely kept as pet members of a human household.
Hedgehogs and sugar gliders are considered exotic pets and may not be kept as pets in some states, such as California, or in various local jurisdictions.
The hedgehog is a prickly little creature, weighing between 6 ounces and 2 pounds. The two species of hedgehogs generally kept as pets are the African hedgehog (Atelerix albiventris) and European hedgehog (Erinaceus europaeus). While a hedgehog can eat up to its own weight in insects, when kept as a pet you should feed it a balanced diet designed for hedgehogs and supplement its diet with crunchy insect snacks.
Sugar gliders (Petaurus breviceps) are marsupials from Australia, New Guinea and nearby islands. A mature sugar glider is 11 to 12 inches long, including the tail, and weighs between 2.8 and 5.6 ounces. A sugar glider's diet in its natural habitat includes insects, spiders, small vertebrates, sugary tree sap and flower nectar. Sugar gliders are gregarious creatures and need to be kept in pairs or groups to thrive in captivity.