Insects Active at night

Roundneck Sexton Beetle

Nicrophorus orbicollis

iNaturalist Wikipedia

A fascinating nocturnal recycler, the Roundneck Sexton Beetle is the forest's master undertaker. Known for its devoted parental care and striking orange-on-black markings, this beetle plays a vital role in keeping our ecosystems clean.

0 Sightings

0 Habitats

Quick Identification

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Size

15 to 25 mm (0.6 to 1.0 inches) in length

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Colors

Glossy black body with two distinct orange-red scalloped bands across the elytra (wing covers); antennae tipped with orange-red clubs

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Key Features

Distinctly rounded and smooth black pronotum (thorax plate)
Four bright orange-red markings on the back
Clubbed antennae with orange-red tips
Large, powerful mandibles for moving soil

When You’ll See Them

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Activity pattern Active at night

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Peak hours 9 PM - 3 AM

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Season May-September

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Diet Adults are carnivorous, primarily eating fly larvae (maggots) at carcasses to eliminate competition for their young; larvae feed directly on the buried carcass.

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Habitat Primarily found in deciduous forests and woodlands, but frequently occurs in suburban gardens and parks with ample leaf litter and loamy soil.

public Geographic range

Where Does the Roundneck Sexton Beetle Live?

The Roundneck Sexton Beetle is a native inhabitant of North America, boasting a wide distribution across the eastern and central parts of the continent. Its territory extends from southern Canada, including Ontario and Quebec, down through the eastern United States to the Gulf Coast, and as far west as the Great Plains. Within this range, it is most prolific in temperate regions where consistent moisture and forest cover provide the ideal conditions for its subterranean nursery habits.

Basemap © OpenStreetMap contributors

2 Countries

8.2M km² Range

Least Concern Conservation

US United States

3,801

CA Canada

1,854

Elevation range

0 m1,000 m2,000 m4,000 m

Sea level – 1,800 m

eco

iNaturalist / Verified observation data

5,669 observations

5,642 research grade

2 countries

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Behavior

The Roundneck Sexton Beetle is nature's most industrious undertaker. These beetles are renowned for their highly specialized reproductive behavior, which involves locating the carcass of a small animal, such as a mouse or sparrow, and burying it beneath the soil. Working in pairs, a male and female will excavate the earth from under the carcass until it sinks, then strip it of fur or feathers and coat it in preservative oral and anal secretions to slow decomposition.

Unlike the vast majority of insects, Sexton Beetles exhibit remarkable parental care. After the female lays eggs in a nearby tunnel, both parents stay to guard the 'brood ball' from competitors. When the larvae hatch, the parents actually feed them regurgitated liquid food, much like a bird feeds its chicks, until the young are capable of feeding themselves on the preserved carcass.

While they spend much of their time underground or hidden in leaf litter, they are strong fliers. They use extremely sensitive chemical receptors on their antennae to detect the scent of death from miles away, often arriving at a fresh carcass within hours of an animal's passing.

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Camera Tips

Capturing the Roundneck Sexton Beetle on camera requires a dedicated 'macro' approach because of their small size and nocturnal habits. To increase your chances, set up a bait station in a shaded, wooded corner of your yard. A small piece of pungent meat or even a tablespoon of wet cat food placed in a shallow dish will act as an irresistible lure. Place your camera on a tripod just 6 to 12 inches away from the bait, angled slightly downward to capture the beetle's back markings.

Since these beetles are strictly nocturnal, ensure your camera's infrared (IR) flash is optimized for close-range subjects to avoid 'white-out' on their shiny, reflective black bodies. If your camera allows for focal adjustment, set it to the shortest possible distance. If you are using an AI-powered camera, make sure the sensitivity is set to 'High' to trigger on the relatively small movement of an insect.

The best time to film them is on warm, humid summer nights when the air is still. You can often capture fascinating footage of the 'tussle' that occurs when multiple beetles arrive at the same bait. For the best educational footage, try to capture them as they begin the 'bulldozing' process—plowing through the dirt to move the food source. Look for them from late spring through late summer, as they enter diapause (hibernation) deep in the soil once the first frost arrives.

Similar Species

Species that look similar or are commonly confused with Roundneck Sexton Beetle.

Tomentose Burying Beetle

Features a dense patch of golden-yellow hairs on the pronotum, whereas the Roundneck is smooth and hairless.

American Burying Beetle

Much larger and features a distinct orange-red spot on the pronotum, which is solid black on the Roundneck.

Say's Sexton Beetle

Has a smaller, more rectangular pronotum and the orange bands on the wings are shaped differently.

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Frequently Asked Questions

Roundneck Sexton Beetles are strictly nocturnal. They are most active during the middle of the night, typically between 9 PM and 3 AM, when they use their sensitive antennae to track the scent of carrion in the cool night air.

The best way to attract them is to provide a habitat with plenty of leaf litter and loose, moist soil. You can lure them into view for a camera by placing a small amount of high-protein bait, like wet cat food or a scrap of raw meat, in a wooded or shaded area of your garden.

Adults primarily eat fly larvae (maggots) that they find on carcasses; this helps 'clean' the carcass for their own offspring. The beetle larvae live inside a buried carcass and feed on the tissue that has been pre-processed and preserved by their parents.

Yes, they are quite common in suburban environments, especially in yards with mature trees, compost piles, or proximity to wooded parks. They are often attracted to porch lights at night, though they prefer to stay on the ground near decaying organic matter.

The Roundneck Sexton Beetle (N. orbicollis) is distinguished by its 'roundneck'—a pronotum (the shield behind the head) that is completely circular and smooth, lacking the golden hairs found on the Tomentose Burying Beetle or the orange spot found on the rare American Burying Beetle.

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