Beetles like to eat leaves, and some like to eat grain and decaying matter.

The beetle has a hard body wall, and the forewings are hard and horny, forming elytra, which meet in a straight line at the center of the back when stationary. The hind wings are membranous and usually overlap vertically and horizontally under the elytra.

Both adults and larvae have chewing mouthparts.

Most of the larvae are oligopods with vestigial abdominal legs.

The pupa is from the pupa.

Eggs are mostly round or spherical.

The head shell is hard, and the head shape is generally front or lower mouth.

The forehead and top of the head extend extremely forward to form the "beak" of the elephant trunk, and the mouthparts are born at the end of the beak.

The antennae are filamentous, rod-shaped, serrated, tooth-shaped, bead-shaped, gill-shaped, and knee-shaped.

Compound eyes are usually well-developed, round, oval or kidney-shaped, some degenerate or disappear, and few species have single eyes.

The upper lip is well developed, sometimes hidden under the lip base or disappearing, and the palate is mostly well developed.

Extended information: Beetles are the oldest type of insects. They flourished in the Upper Jurassic or Lower Baikuan.

At that time, higher plants had not yet appeared, nor did the insects of the order Hymenoptera and Lepidoptera. Beetles were the earliest pollinating insects in geological history.

The beetle's original positive collar is suitable for pollinating some more primitive plants with large and flat flowers (butterfly or bowl-shaped flowers). They have a strong odor to attract beetles.