Nicrophorus orbicollis
In 3 days ~20% in a week ~40%
Nicrophorus orbicollis is a nearctic burying beetle first described by Thomas Say in 1825. It is a member of the genus Nicrophorus or sexton beetles, comprising the most common beetles in the family Silphidae. This species is a decomposer feeding on carcasses of small dead animals. N. orbicollis can be used for scientific research both medically and forensically (if the beetle is present in the area).
Nicrophorus orbicollis is immediately recognized by its colorful orange markings on its elytra. The dorsal surface of the elytra is covered in long, fine setae, especially laterally, giving it a hairy appearance. The pronotum is spherical with wide lateral and basal margins. Its most distinctive feature from other Silphidae is its clubbed antennae with three orange apical segments and a black base. The posterior lobe of the metepimeron has a few brown hairs and the hind tibia is straight. The adult form is moderately sized at about 15–22 mm (0.59–0.87 in) long. N. orbicollis is known to be a saprophagous feeder. The adults feed on protein from smaller decomposing carcasses as well as supply these nutrients to their larvae.
Larval N.orbicollis... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 2 | Acadia National Park | 🇺🇸 United States | |
| 3 | Shenandoah National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Washington | 🇺🇸 United States | |
| 2 | Montreal | 🇨🇦 Canada | |
| 3 | Toronto | 🇨🇦 Canada | |
| 4 | New York City | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Roundneck Sexton Beetle sighting in Great Smoky Mountains National Park on a given day, based on 23 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 217th most-seen of the 822 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
April–May and July–September
In those months about 10% of wildlife watchers report a Roundneck Sexton Beetle in Great Smoky Mountains National Park on a given day, against under 5% in June and October–March, the lowest months.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Roundneck Sexton Beetle sightings with a recorded time, and about 7 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Yes
Of the 3 parks where we can rate Roundneck Sexton Beetle sightings, Great Smoky Mountains National Park has the highest daily chance: about 10%. Next come Acadia National Park (United States, about 10%) and Shenandoah National Park (United States, about 10%).
Same genus: Nicrophorus
The closest relatives of the Roundneck Sexton Beetle that you can see in Great Smoky Mountains National Park (genus Nicrophorus, Burying Beetles) are Tomentose Burying Beetle (about 10%) and Boreal Burying Beetle (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Roundneck Sexton Beetle is recorded against all the insects logged in Great Smoky Mountains National Park (23 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
