Ischiodon scutellaris
In 3 days ~10% in a week ~20%
Ischiodon scutellaris, commonly known as the common hover fly or yellow-shouldered hover fly, is a species of hover fly found in India, Turkey to Japan and Australia, as well as all the Pacific islands except for Hawaii.
Larvae feed on aphids, and are considered an effective biological control agent. 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 Yellow-Shouldered Hover Fly sighting in Sydney on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 666th most-seen of the 742 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 Yellow-Shouldered Hover Fly in Sydney on a given day, so our monthly data shows no clear season.
17th of 17
Of the 17 cities where we can rate Yellow-Shouldered Hover Fly sightings, Sydney ranks 17th at under 5%. The best odds are in Raipur (India, about 20%), Dhaka (Bangladesh, about 20%) and Jaipur (India, about 20%).
Same family: Syrphidae
The closest relatives of the Yellow-Shouldered Hover Fly that you can see in Sydney (family Syrphidae, Hover Flies) are Yellow-Shouldered Stout Hover Fly (about 10%) and Native Drone Fly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Yellow-Shouldered Hover Fly is recorded against all the insects logged in Sydney (5 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.
