Instructions
Venture outside during the warmer months of the summer at night. Stand still underneath a porch light or other outdoor light. Chances are you will have a large May beetle (sometimes called June bug) or June beetle buzz by you. These species, particularly, are known for their loud, buzzing flights.
Catch one of the flying beetles in your hand, or wait for it to fly into something and fall. These beetles are harmless to humans.
Examine the beetle under a light. Scarab beetles have club-like antennae that they can open or close into a tight ball. Their antennae also have leaf-like plates on them.
Go outside and look for Japanese beetles. These pests are also scarabs, and if you have them, you've probably just found a lot of scarab beetles because they congregate in large numbers.
Walk around a cattle or large animal pasture and look at the ground. Many dung beetles, also scarabs, thrive in these habitats because their primary food source, dung, is readily available.
Research different scarab beetles. Some of them feed on specific plants or on certain plants more than other plants. For example, the goldsmith beetle prefers the foliage of poplar trees.