Anthrax irroratus
In 3 days ~10% in a week ~20%
Anthrax irroratus is a species of bee fly in the family Bombyliidae. It is widespread in North America, found across most of Canada and the United States as far north as Alaska and the Northwest Territories, and south into Mexico, Guatemala, Honduras, and Puerto Rico. The larvae are parasitoids of a variety of solitary bees and wasps across at least five different families. 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 Spotted Bee Fly sighting in Boston on a given day, based on 15 verified sightings from GBIF citizen-science data. It is the 612th 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.
August
In that month about 10% of wildlife watchers report a Spotted Bee Fly in Boston on a given day, against under 5% in September to July, the lowest months.
Yes
Of the 3 cities where we can rate Spotted Bee Fly sightings, Boston has the highest daily chance: under 5%. Next come Toronto (Canada, under 5%) and Edmonton (Canada, under 5%).
GBIF citizen-science records
It is estimated from how often the Spotted Bee Fly is recorded against all the insects logged in Boston (15 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.
