Diasemia monostigma
In 3 days ~30% in a week ~50%
Diasemia monostigma, the black wedge pyrale, is a moth of the family Crambidae. It is found in South and East Africa, including islands of the Indian Ocean. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Garden Route National Park | 🇿🇦 South Africa | |
| 2 | Table Mountain National Park | 🇿🇦 South Africa |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Pretoria | 🇿🇦 South Africa | |
| 2 | Harare | 🇿🇼 Zimbabwe | |
| 3 | Johannesburg | 🇿🇦 South Africa | |
| 4 | Durban | 🇿🇦 South Africa | |
| 5 | Cape Town | 🇿🇦 South Africa |
With luck
About 10% of wildlife watchers report a Black Wedge Pyralis sighting in Johannesburg on a given day, based on 26 verified sightings from GBIF citizen-science data. It is the 52nd most-seen of the 213 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
September and November
In those months about 20% of wildlife watchers report a Black Wedge Pyralis in Johannesburg on a given day, against under 5% in May and June, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Black Wedge Pyralis sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Among the best
Of the 5 cities where we can rate Black Wedge Pyralis sightings, Johannesburg ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Pretoria (South Africa, about 10%) and Harare (Zimbabwe, about 10%).
Same family: Crambidae
The closest relatives of the Black Wedge Pyralis that you can see in Johannesburg (family Crambidae, Crambid Snout Moths) are Hawaiian Beet Webworm Moth (about 10%), Dotted Sable (about 10%) and Rusty Dot Pearl (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Black Wedge Pyralis is recorded against all the insects logged in Johannesburg (26 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.
