Diabrotica virgifera
In 3 days ~10% in a week ~20%
Diabrotica virgifera is a species of beetle in the family Chrysomelidae. It is an agricultural pest species that attacks maize. It includes two subspecies, Diabrotica virgifera virgifera (the western corn rootworm) and Diabrotica virgifera zeae (the Mexican corn rootworm). 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 Western Corn Rootworm sighting in Chicago on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 706th 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 a Western Corn Rootworm in Chicago on a given day, so our monthly data shows no clear season.
Among the best
Of the 7 cities where we can rate Western Corn Rootworm sightings, Chicago ranks 6th at under 5%, level with the leaders once rounded. The best odds are in Kyiv (Ukraine, under 5%), Vienna (Austria, under 5%) and Montreal (Canada, under 5%).
GBIF citizen-science records
It is estimated from how often the Western Corn Rootworm is recorded against all the insects logged in Chicago (8 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.
