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 Boston on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 1063rd most-seen of the 1200 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 Common Ragweed Fruit Fly in Boston on a given day, so our monthly data shows no clear season.
Among the best
Of the 4 cities where we can rate Common Ragweed Fruit Fly sightings, Boston ranks 4th at under 5%, level with the leaders once rounded. The best odds are in Montreal (Canada, under 5%), Toronto (Canada, under 5%) and Minneapolis [Saint Paul] (United States, 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 Boston (6 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.
