Several groups of beetles eat carrion. Those in the carrion beetle family are flattened, usually black, often with markings of red, orange, or yellow. The shell-like forewings (elytra) have a distinctive shape, wider toward the end of the body and narrower toward the front. In many species, the elytra are too short to cover the final 1 to 3 segments of the abdomen tip. The antennae are distinctively clubbed, often with minute hairs or colors at the very tip. These beetles often secrete or spray foul-smelling substances, or just plain smell bad themselves.
Like those of other beetles, the larvae are grubs. The colors and shape vary according to species.
There are about 30 species in the carrion beetle family in North America north of Mexico, some more common than others. One of these, the American burying beetle (Nicrophorus americanus), is a federally endangered species. Although some types of carrion beetles can be crop pests, most of them perform a vastly important service — transforming rotting corpses into the much less offensive form of their own bodies.
Habitat and Conservation
When a dead person is found, forensic scientists analyze the age and life cycle stages of carrion beetles present and thus can determine an approximate time of death — which helps solve crimes.
Also, by competing with fly maggots, burying beetles help control the numbers of flies that annoy people.
The famous entomologist J. Henri Fabre wrote that carrion beetles make “a clearance of death on behalf of life.” When we overcome our revulsion, we, too, can appreciate these interesting little grave diggers. (By the way, if you're interested in insects, you have to check out Fabre.)
These are the grave-diggers of the insect world. When death comes to animals, this crew of little sextons gets to work transforming the organic nutrients of what would otherwise be a putrid mess into inoffensive, living tissue, and finally back into the soil.
They also help check fly populations.
Many carrion beetle species are bee or wasp mimics, sharing a black plus yellow, orange, or red color pattern, and a heavy, loud-buzzing flight. Seeming like a stinging insect may help them avoid predators.