Borbo gemella
In 3 days ~20% in a week ~30%
Borbo (Torbenlarsenia) gemella, the twin swift, is a butterfly of the family Hesperiidae. It is found in several countries of Africa, including Burkina Faso (but also Madagascar island) and south-western Arabia. The habitat consists of frost-free savanna and forests.
The wingspan is about 42 mm. Adults are attracted to flowers and males mud-puddle. They are on wing year round, with a peak in March and April. The larvae feed on Ehrharta, Triticum, Saccharum and Zea species. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | iSimangaliso Wetland Park | 🇿🇦 South Africa | |
| 2 | Kruger National Park | 🇿🇦 South Africa |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Durban | 🇿🇦 South Africa |
With luck
About 10% of wildlife watchers report a Twin Swift sighting in Durban on a given day, based on 16 verified sightings from GBIF citizen-science data. It is the 143rd most-seen of the 401 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
February–April, July and November
In those months about 10% of wildlife watchers report a Twin Swift in Durban on a given day, against under 5% in May–June, August–October and December–January, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Twin Swift sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Durban, in our data
Durban is the only city on Wallace's Line with enough records to rate Twin Swift sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Twin Swift is recorded against all the insects logged in Durban (16 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.
