Rasahus thoracicus
In 3 days ~10% in a week ~20%
The western corsair (Rasahus thoracicus) is a species of assassin bug and is one of the two species of "two spotted corsairs", the other being Rasahus biguttatus. The adults have an orange and black body and an orange spot on each wing. They feed primarily on other insects and after dark are attracted to bright lights (where prey are ample). The bite of the western corsair can be extremely painful. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Big Bend National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sacramento | 🇺🇸 United States | |
| 2 | Los Angeles | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Western Corsair Bug sighting in Sacramento on a given day, based on 10 verified sightings from GBIF citizen-science data. It is the 238th most-seen of the 386 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 and September
In those months about 10% of wildlife watchers report a Western Corsair Bug in Sacramento on a given day, against under 5% in October to July, the lowest months. Those are among Sacramento's driest months, with almost no rain against 120 mm in December.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Western Corsair Bug sightings with a recorded time, and nearly all of them come between 6 pm and 6 am: it is mostly seen at night.
Yes
Of the 2 cities where we can rate Western Corsair Bug sightings, Sacramento has the highest daily chance: under 5%. Next come Los Angeles (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Western Corsair Bug is recorded against all the insects logged in Sacramento (10 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.
