Sandalus niger
In 3 days ~20% in a week ~40%
Sandalus niger, known generally as the cedar beetle or cicada parasite beetle, is a species of cicada parasite beetle in the family Rhipiceridae. It is found in North America. Although both females and males fly, the females are usually found motionless on the side of the elm trees. Males fly throughout the afternoon during temperatures ranging from 15 to 30C, anything below 15C causes the males to be immobilized. Unless it involves periods of mating, in this case, they stay motionless and do not fly. Once mating is completed, the females go high into the trees, around 10 meters or higher, before releasing their eggs in holes or behind the bark of the elms. Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Cedar Beetle sighting in Detroit on a given day, based on 18 verified sightings from GBIF citizen-science data. It is the 103rd most-seen of the 268 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.
September and October
In those months about 20% of wildlife watchers report a Cedar Beetle in Detroit on a given day, against under 5% in December to August, the lowest months.
Yes
Of the 6 cities where we can rate Cedar Beetle sightings, Detroit has the highest daily chance: about 10%. Next come Chicago (United States, under 5%) and Dallas (United States, under 5%).
Same order: Coleoptera
The closest relatives of the Cedar Beetle that you can see in Detroit (order Coleoptera, Beetles) are Asian Lady Beetle (about 30%), Red Milkweed Beetle (about 20%) and Japanese Beetle (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Cedar Beetle is recorded against all the insects logged in Detroit (18 verified sightings), 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.
