Betasyrphus serarius
In 3 days ~10% in a week ~20%
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Betasyrphus serarius sighting in Tokyo on a given day, based on 16 verified sightings from GBIF citizen-science data. It is the 509th most-seen of the 1013 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.
November and December
In those months about 10% of wildlife watchers report a Betasyrphus serarius in Tokyo on a given day, against under 5% in January to October, the lowest months.
Among the best
Of the 2 cities where we can rate Betasyrphus serarius sightings, Tokyo ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Sydney (Australia, under 5%).
Same family: Syrphidae
The closest relatives of the Betasyrphus serarius that you can see in Tokyo (family Syrphidae, Hover Flies) are Marmalade Hover Fly (about 10%), Helophilus eristaloideus (about 10%) and Phytomia zonata (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Betasyrphus serarius is recorded against all the insects logged in Tokyo (16 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.
