Sandalus niger
In 3 days ~10% in a week ~20%
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.
Rare
Under 5% of wildlife watchers report a Cedar Beetle sighting in Dallas on a given day, based on 19 verified sightings from GBIF citizen-science data. It is the 690th most-seen of the 1412 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
September
In that month about 10% of wildlife watchers report a Cedar Beetle in Dallas on a given day, against under 5% in October to August, the lowest months.
3rd of 6
Of the 6 cities where we can rate Cedar Beetle sightings, Dallas ranks 3rd at under 5%. The best odds are in Detroit (United States, about 10%) and Chicago (United States, under 5%).
Same order: Coleoptera
The closest relatives of the Cedar Beetle that you can see in Dallas (order Coleoptera, Beetles) are Asian Lady Beetle (about 30%), Spotted Cucumber Beetle (about 20%) and Seven-Spotted Lady 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 Dallas (19 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.
