Ophiusa tirhaca
In 3 days ~10% in a week ~30%
Ophiusa tirhaca, the green drab, is a moth of the family Erebidae. The species was first described by Pieter Cramer in 1777. It is found in southern Europe, Africa, Australia and the southern parts of Asia. The wingspan is about 50 mm.
The larvae feed on heath, Pistacia lentiscus, Pistacia terebinthus, Cotinus coggygria, Rhus coriaria, Rhus cotinus, Cistus, Eucalyptus, Osyris, Viburnum and Pelargonium. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kruger National Park | 🇿🇦 South Africa | |
| 2 | Table Mountain National Park | 🇿🇦 South Africa |
Rare
Under 5% of wildlife watchers report a Green Drab sighting in Johannesburg on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 164th most-seen of the 213 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.
February–April and October–November
In those months about 10% of wildlife watchers report a Green Drab in Johannesburg on a given day, against under 5% in May–September and December–January, the lowest months.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Green Drab sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is most active around dawn and dusk.
3rd of 6
Of the 6 cities where we can rate Green Drab sightings, Johannesburg ranks 3rd at under 5%. The best odds are in Tel Aviv (Israel, about 10%) and Perth (Australia, about 10%).
Same family: Erebidae
The closest relatives of the Green Drab that you can see in Johannesburg (family Erebidae, Underwing, Tiger, Tussock, and Allied Moths) are Creamstriped Owl (about 30%), Lederhosen Moth (about 10%) and Graphic Ermine (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Green Drab is recorded against all the insects logged in Johannesburg (6 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.
