Euaresta bella
In 3 days ~10% in a week ~20%
Euaresta bella is a species of tephritid or fruit flies in the family Tephritidae. The larvae feed on Ambrosia artemisiifolia, the only known host. There is one generation per year. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Montreal | 🇨🇦 Canada | |
| 2 | Toronto | 🇨🇦 Canada | |
| 3 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 4 | Boston | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Common Ragweed Fruit Fly sighting in Toronto on a given day, based on 31 verified sightings from GBIF citizen-science data. It is the 514th most-seen of the 1689 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 Common Ragweed Fruit Fly in Toronto on a given day, against under 5% in September to July, the lowest months.
Among the best
Of the 4 cities where we can rate Common Ragweed Fruit Fly sightings, Toronto ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Montreal (Canada, under 5%).
GBIF citizen-science records
It is estimated from how often the Common Ragweed Fruit Fly is recorded against all the insects logged in Toronto (31 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.
