Leptotarsus costalis
In 3 days ~10% in a week ~30%
Leptotarsus costalis is an Australian species of crane fly in the family Tipulidae. A large insect with a narrow body and small head. The two wings are held almost at right angles to the body. Legs and antennae are long. The rostrum is as long as the head. Body length to 1.5 cm. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Blue Mountains National Park | 🇦🇺 Australia |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Common Brown Crane Fly sighting in Blue Mountains National Park on a given day, based on 8 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 456th most-seen of the 789 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
September to November
In those months about 10% of wildlife watchers report a Common Brown Crane Fly in Blue Mountains National Park on a given day, against under 5% in December to August, the lowest months.
Between 6 and 9 pm
Across all the parks we cover, that three-hour window holds the most Common Brown Crane Fly sightings with a recorded time, and about 8 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Only Blue Mountains National Park, in our data
Blue Mountains National Park is the only park on Wallace's Line with enough records to rate Common Brown Crane Fly sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Common Brown Crane Fly is recorded against all the insects logged in Blue Mountains National Park (8 verified sightings from 2019 to 2026), 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.
