Saperda candida
In 3 days ~10% in a week ~30%
Saperda candida, the roundheaded appletree borer, is a species of beetle in the family Cerambycidae. It was described by Johan Christian Fabricius in 1787. It is known from Canada and the United States. It contains the varietas Saperda candida var. bipunctata.
Saperda candida is preyed upon by the parasitoid wasp species Cenocoelius saperdae. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Acadia National Park | 🇺🇸 United States | |
| 2 | Great Smoky Mountains National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Montreal | 🇨🇦 Canada |
Rare
Under 5% of wildlife watchers report a Round-Headed Apple Tree Borer sighting in Great Smoky Mountains National Park on a given day, based on 9 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 441st most-seen of the 822 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
May and July–August
In those months about 10% of wildlife watchers report a Round-Headed Apple Tree Borer in Great Smoky Mountains National Park on a given day, against under 5% in June and September–April, the lowest months.
Between 4 and 7 pm
Across all the parks we cover, that three-hour window holds the most Round-Headed Apple Tree Borer sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
2nd of 2
Of the 2 parks where we can rate Round-Headed Apple Tree Borer sightings, Great Smoky Mountains National Park ranks 2nd at under 5%. The best odds are in Acadia National Park (United States, about 10%).
Same family: Cerambycidae
The closest relatives of the Round-Headed Apple Tree Borer that you can see in Great Smoky Mountains National Park (family Cerambycidae, Longhorn Beetles) are Broad-Necked Root Borer (about 20%), Strangalepta Flower Longhorn Beetle (about 10%) and Eastern Elderberry Borer (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Round-Headed Apple Tree Borer is recorded against all the insects logged in Great Smoky Mountains National Park (9 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.
