Aptera fusca
In 3 days ~20% in a week ~40%
Aptera fusca, the Cape Mountain cockroach, giant cockroach or Table Mountain cockroach, is a large cockroach which is widespread on low vegetation in open areas in the fynbos biome of the Western Cape region of South Africa. Adult females can be from 30 to 40 millimetres (1.2 to 1.6 in) long. Males are slightly smaller (body length 29 millimetres (1.1 in)) and have dark brown wings, which are absent in females. It is stoutly built, with a reddish head and brown to black body segments with prominent yellow margins. The femora are heavily spined, with the hind tibiae having two very broad ridges with only two rows of spurs. They are nocturnal and herbivorous. Unusually for insects, it gives birth to 18–24 live offspring and protects the young for a while after giving birth. Family groups are found in late summer and autumn: a brood of black nymphs, a wingless female and two or more males, all living in a hidden crack. When alarmed, it raises its abdomen into the air and squeaks loudly; it also releases a foul-smelling liquid from glands on the back when handled and alarmed, producing an indelible brown stain on skin. The only other species in the genus Aptera, A. munda, is rare, and is found in the Richtersveld. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | De Hoop Nature Reserve | 🇿🇦 South Africa | |
| 2 | Garden Route National Park | 🇿🇦 South Africa | |
| 3 | Table Mountain National Park | 🇿🇦 South Africa | |
| 4 | West Coast National Park | 🇿🇦 South Africa |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cape Town | 🇿🇦 South Africa |
With luck
About 10% of wildlife watchers report a Cape Mountain Cockroach sighting in Cape Town on a given day, based on 54 verified sightings from GBIF citizen-science data. It is the 78th most-seen of the 311 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
March–June and August–October
In those months about 10% of wildlife watchers report a Cape Mountain Cockroach in Cape Town on a given day, against under 5% in July and November–February, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Cape Mountain Cockroach 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 Cape Town, in our data
Cape Town is the only city on Wallace's Line with enough records to rate Cape Mountain Cockroach sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Cape Mountain Cockroach is recorded against all the insects logged in Cape Town (54 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.
