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 Seattle on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 332nd most-seen of the 428 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 Western Corn Rootworm in Seattle on a given day, against under 5% in October to August, the lowest months. That is one of Seattle's driest months, with about 60 mm of rain against 190 mm in November.
Among the best
Of the 7 cities where we can rate Western Corn Rootworm sightings, Seattle ranks 4th 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 Seattle (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.
