Scarabs, also called scarab beetles, are a family of beetles that includes flower chafers, dung beetles, June beetles, rhinoceros beetles, and the Japanese Beetle (Popillia japonica). Flat plates at the tips of their antennae open and close like a fan, a useful way to recognize the family.

In this group

Japanese BeetlePopillia japonica

This introduced beetle is widespread in much of the eastern and central United States. Adults are metallic green and bronze, with small white hair tufts along the abdomen.

Green June BeetleCotinis nitida

In Missouri, this metallic green beetle visits ripe fruit and compost. Its stout body and green underside help separate it from the smaller Japanese Beetle.

Eastern Hercules BeetleDynastes tityus

Look in eastern U.S. deciduous woods or near lights at night. Males have two forward-pointing horns; females lack them.

Rainbow ScarabPhanaeus vindex

This Missouri dung beetle shines green and copper. Males have a horn that points backward from the head.

Appearance

Appearance
The family ranges from small brown beetles to metallic flower chafers and large horned rhinoceros beetles. Check the antenna club before relying on color or size.
How to recognize it
Most have a sturdy oval body and antennae ending in several flat that open like a fan. The front tibiae often have teeth suited for digging.

Look-alikes

Stag BeetlesLucanidae

A scarab's antennal plates can close together into a compact club. In most stag beetles, club segments remain separated like the teeth of a comb, and males of many species have enlarged jaws.

Why they get mixed upBoth are sturdy beetles often found around soil, wood, or lights.

Where it lives

Typical habitats
  • woodlands
  • lawns and crop fields
  • flowers and foliage
  • dung and decaying material
Range
Scarabs live in many terrestrial habitats worldwide. More than 1,000 species are known from North America, with very different ways of life among the major groups.
Preferred conditions
Larvae may develop in soil, rotting wood, compost, or dung, depending on the species. Adults may visit leaves, flowers, fruit, sap, lights, or animal droppings.

Behavior

Diet
Depending on the species, adults use leaves, flowers, sap, fruit, dung, fungi, or decaying matter. No single diet describes the whole family.
Activity
Some species fly to lights at night, while many flower chafers are active during the day. Timing is useful only after the group has been narrowed.

Life cycle

Reproduction
The larvae are commonly C-shaped with a distinct head and legs near the front. Scarabs pass through egg, larval, pupal, and adult stages in .

Name and classification

About the name
Classification systems differ in whether they treat some scarab lineages as separate families or as parts of a broad Scarabaeidae.
Scarabs (Scarabaeidae) — identification, habitat & look-alikes | Moeyo