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 Montreal on a given day, based on 10 verified sightings from GBIF citizen-science data. It is the 556th most-seen of the 926 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.
August
In that month about 10% of wildlife watchers report a Western Corn Rootworm in Montreal on a given day, against under 5% in September to July, the lowest months.
Among the best
Of the 7 cities where we can rate Western Corn Rootworm sightings, Montreal ranks 3rd at under 5%, level with the leaders once rounded. The best odds are in Kyiv (Ukraine, under 5%) and Vienna (Austria, under 5%).
Same genus: Diabrotica
The closest relatives of the Western Corn Rootworm that you can see in Montreal (genus Diabrotica) are Spotted Cucumber Beetle (about 10%) and Northern Corn Rootworm (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Western Corn Rootworm is recorded against all the insects logged in Montreal (10 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.
