Causus defilippii
Silhouette: Steven Traver · PhyloPic
In 3 days ~20% in a week ~40%
Causus defilippii, also known commonly as the snouted night adder, is a species of venomous snake in the subfamily Viperinae of the family Viperidae. The species is native to East Africa and Southern Africa. Although its venom is nonlethal to humans, it is still considered medically significant. There are no subspecies that are recognized as being valid.
The specific name, defilippii, is in honor of Italian zoologist Filippo De Filippi. The average total length (including tail) of C. defilippii is 20–35 cm (8–14 in), rarely exceeding 50 cm (20 in). The head is short and wide, and the snout is prominent, pointed and upturned. The rostral is large. The eyes are medium-sized. The circumorbital ring consists of 1–2 preocular scales, 1–2 postoculars and 1–2 suboculars that separate the eye from the supralabials. There are a total of 6–7 supralabials and 7–10 sublabials. The first 3–4 sublabials are in contact with the anterior chin shields. The posterior chin shields are very small and indistinguishable from other posterior scales. The temporal scales number 2+3, sometimes 2+4, and rarely 1+2.
Midbody there are 16–18 rows of weakly keeled dorsal scales that... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Gorongosa National Park | 🇲🇿 Mozambique | |
| 2 | Kruger National Park | 🇿🇦 South Africa |
With luck
About 10% of wildlife watchers report a Snouted Night Adder sighting in Kruger National Park on a given day, based on 20 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 38th most-seen of the 62 reptiles 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.
February, April–May and November–December
In those months about 10% of wildlife watchers report a Snouted Night Adder in Kruger National Park on a given day, against under 5% in January, March and June–October, the lowest months. Those are among Kruger National Park's wettest months, with about 60 mm of rain a month against almost none in August.
Between 6 and 9 am
Across all the parks we cover, that three-hour window holds the most Snouted Night Adder sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 2
Of the 2 parks where we can rate Snouted Night Adder sightings, Kruger National Park ranks 2nd at about 10%. The best odds are in Gorongosa National Park (Mozambique, about 20%).
GBIF citizen-science records
It is estimated from how often the Snouted Night Adder is recorded against all the reptiles logged in Kruger National Park (20 verified sightings from 2019 to 2026), 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.
