Beetles belong to the insect order Coleoptera. This is the largest order of insects. There are more than a quarter million species of beetles in the world. In North America, scientists have identified more than 25,000 beetle species.


Sometimes people mistake cockroaches for beetles. If the beetle is an adult, it can usually be identified by looking at the wings

The front wings are called Elyta. These front wings are often very hard and appear more like a shell than wings. The beetle folds the front wings so they cover the back wings. Most adult beetles seem to have a line down their back where the two front wings meet. Beetles come in many shapes, sizes and colors. Some, like the click beetles, are long and slender. Some beetles like Lady Beetles and June Beetles (also known as June Bugs) have an oval or rounded shape. There are even beetles that resemble spiders.

Behavior, Diet & Habits

Beetles develop in a four-stage life cycle. Scientists call this a complete metamorphosis. The stages are egg, larva, pupa and adult. The length of the life cycle also varies according to the type of beetle. Some beetles develop very quickly and they can produce more than one generation each year. Others, like some of the wood-boring beetles can take several years to decades to develop from an egg to an adult insect. The length of the life cycle also depends on the amount of food that is available for the larvae to eat as well as environmental conditions.
Beetles feed on many different plant and animal material. Adult beetles often deposit their eggs near the food that the larvae will eat when they come out of their eggs.
Some beetles can become destructive pests. Carpet Beetle larvae eat natural fibers and feathers. They often damage woolens and other fabrics. Other beetles, like powder post beetles, feed on hardwoods and bamboo. These pests attack furniture and other items made of wood.
Some, like Flour Beetles and the Grain Beetles, attack food products in homes. They also damage food in production facilities and stores. Some beetles damage lawns and landscapes. Immature June Beetles, (called Grubs) attack the roots of grass. The Elm Leaf Beetle damages trees by eating the leafs.
Some beetles are beneficial insects. The Lady Beetles (often called Lady Bugs) feeds on plant pests like Aphids and Mealy Bugs. Gardeners appreciate these beetles and try to keep them in their garden.
Sometimes beetles, including Lady Beetles and Ground Beetles can become nuisances. In the late summer and fall, homeowners can find hundreds of these beetles in clusters on the outside of the home. The beetles are trying to invade homes for shelter through the winter or are looking to escape inclement conditions.

Some Common Types of Beetles

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