Hydrellia tritici
In 3 days ~10% in a week ~20%
Hydrellia tritici, the black pasture fly or shore fly, is an insect native to Australia. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Otway National Park | 🇦🇺 Australia | |
| 2 | Blue Mountains National Park | 🇦🇺 Australia |
Rare
Under 5% of wildlife watchers report a Black Pasture Fly sighting in Sydney on a given day, based on 12 verified sightings from GBIF citizen-science data. It is the 468th 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.
July
In that month about 10% of wildlife watchers report a Black Pasture Fly in Sydney on a given day, against under 5% in August to June, the lowest months. That is one of Sydney's driest months, with about 45 mm of rain against 130 mm in February.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Black Pasture Fly sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 3
Of the 3 cities where we can rate Black Pasture Fly sightings, Sydney ranks 3rd at under 5%. The best odds are in Auckland (New Zealand, about 10%) and Melbourne (Australia, about 10%).
Same order: Diptera
The closest relatives of the Black Pasture Fly that you can see in Sydney (order Diptera, Flies) are Yellow-Shouldered Stout Hover Fly (about 10%), Garden Soldier Fly (about 10%) and Toxorhynchites speciosus (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Black Pasture Fly is recorded against all the insects logged in Sydney (12 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.
