Causus maculatus
Silhouette: Steven Traver · PhyloPic
In 3 days ~50% in a week ~80%
Causus maculatus is species of venomous snake in the subfamily Viperinae of the family Viperidae. The species is native to West Africa and Central Africa. There are no subspecies that are recognized as being valid. Common names include forest rhombic night adder, West African night adder, and spotted night adder.
C. maculatus is small and stout, with an average total length (tail included) of 30–60 cm (12–24 in). It grows to a maximum total length of about 70 cm (28 in), or perhaps slightly longer. The snout is obtuse with a rounded rostral scale. A single loreal is present. The circumorbital ring consists of 2–3 preoculars, 1–2 postoculars and 1–2 suboculars. There are 6 supralabials and 9–10 sublabials. Four sublabials are in contact with the sublinguals. There are 2–3 temporal scales.
At midbody there are 17–19 rows of dorsal scales. The ventral scales number 118–137 in females and 124–144 in males. The subcaudal scales number 14–23 in females and 15–26 in males. Within the geographic range of this species, the ventral scale counts increase from south to north and from east to west. This diagnostic information is apparently according to Hughes (1977).
Spawls and... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Lagos | 🇳🇬 Nigeria |
No species of the same family or order lives in Lagos, so these are its closest relatives here: other reptiles.
Possible
About 20% of wildlife watchers report a Spotted Night Adder sighting in Lagos on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 7th most-seen of the 8 reptiles we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
February and June
In those months about 40% of wildlife watchers report a Spotted Night Adder in Lagos on a given day, against under 5% in March–May and September–January, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Spotted Night Adder sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Lagos, in our data
Lagos is the only city on Wallace's Line with enough records to rate Spotted Night Adder sightings: about 20% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Spotted Night Adder is recorded against all the reptiles logged in Lagos (6 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.
