Snouted Night Adder

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 have a velvety appearance. There are 108–128 ventral scales: rarely more than 117 in males, or less than 118 in females. The anal scale is single. The divided subcaudals number 10–19: seldom less than 14 in males, or more than 15 in females. The color pattern consists of a light brown, pinkish brown to gray or grayish green ground color, overlaid with a series of 20–30 crescent-shaped dark markings that run down the back. However, these marking may be indistinct. The head has a characteristic V-shaped marking with the apex on the frontal plate. There is also an oblique dark streak present behind the eye. …

The snouted night adder is found in Tanzania and the Democratic Republic of the Congo southward through Malawi, Zambia, Mozambique, and Zimbabwe to South Africa and Eswatini. The type locality was originally listed as "Buenos Ayres", obviously a mistake. It was restricted by Broadley (1971) to Africa, Puku.

The snouted night adder is generally nocturnal, but not entirely. It is mostly terrestrial, but sometimes climbs into low vegetation in pursuit of frogs, and is also a good swimmer. When not basking, it remains hidden in ground cover, brush piles, and in holes. If disturbed, it inflates itself and hisses. It is slow-moving for the most part, but can strike quickly. In captivity, however, it soon becomes tame and unwilling to strike.

The specific name, defilippii, is in honor of Italian zoologist Filippo De Filippi.