Pseudonympha magus
In 3 days ~30% in a week ~60%
Pseudonympha magus, the silver-bottom brown, is a butterfly of the family Nymphalidae. It is found in South Africa, from the Western Cape south to Cape Town and along the southern littoral north to the Eastern Cape. The wingspan is 40–44 mm for males and females. Adults are on wing from September to April (with a peak in October and February). There are two overlapping generations per year.
The larvae feed on Poaceae grasses, including Cynodon dactylon. Larvae have also been reared on Ehrharta erecta. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | West Coast National Park | 🇿🇦 South Africa | |
| 2 | Table Mountain National Park | 🇿🇦 South Africa | |
| 3 | Garden Route National Park | 🇿🇦 South Africa |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cape Town | 🇿🇦 South Africa |
With luck
About 10% of wildlife watchers report a Silver-Bottom Brown sighting in Cape Town on a given day, based on 171 verified sightings from GBIF citizen-science data. It is the 31st most-seen of the 311 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
October
In that month about 30% of wildlife watchers report a Silver-Bottom Brown in Cape Town on a given day, against under 5% in June–August and December–March, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Silver-Bottom Brown sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Only Cape Town, in our data
Cape Town is the only city on Wallace's Line with enough records to rate Silver-Bottom Brown sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Nymphalidae
The closest relatives of the Silver-Bottom Brown that you can see in Cape Town (family Nymphalidae, Brush-footed Butterflies) are Garden Acraea (about 30%), Painted Lady (about 20%) and Cape Autumn Widow (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Silver-Bottom Brown is recorded against all the insects logged in Cape Town (171 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.
