Saperda tridentata
In 3 days ~10% in a week ~20%
The elm borer (Saperda tridentata) is a species of beetle in the family Cerambycidae. It was described by Guillaume-Antoine Olivier in 1795. It is known from Canada and the United States. It feeds on Ulmus rubra and Ulmus americana. It acts as a vector for the fungus Ophiostoma ulmi, and as a host for the parasitoid wasp Cenocoelius saperdae. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report an Elm Borer sighting in Chicago on a given day, based on 12 verified sightings from GBIF citizen-science data. It is the 602nd most-seen of the 978 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report an Elm Borer in Chicago on a given day, so our monthly data shows no clear season.
Among the best
Of the 6 cities where we can rate Elm Borer sightings, Chicago ranks 4th at under 5%, level with the leaders once rounded. The best odds are in Dallas (United States, under 5%), Baltimore (United States, under 5%) and Montreal (Canada, under 5%).
Same family: Cerambycidae
The closest relatives of the Elm Borer that you can see in Chicago (family Cerambycidae, Longhorn Beetles) are Red Milkweed Beetle (about 20%) and Locust Borer (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Elm Borer is recorded against all the insects logged in Chicago (12 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.
