How to Identify Broadley's Bush Viper (Identification Guide)
A guide to recognizing Broadley's Bush Viper by its keeled scales, mottled green-brown coloration, and narrow East African forest range.
Read the full Broadley's Bush Viper encyclopedia entry →Key identifying features
Broadley's Bush Viper (Atheris broadleyi) is a small, rarely encountered arboreal viper from Central Africa, identifiable by its rough keeled scalation, mottled cryptic coloration, and the compact, laterally compressed body typical of climbing vipers. It closely resembles other Atheris species and is best distinguished with attention to scale texture and locality.
Coloration & pattern
The base color is typically olive-green to brownish-gray, often with darker blotches or irregular mottling along the back that helps the snake blend into leaf litter and mossy branches. Some individuals show a subtle yellowish or grayish wash between the darker markings. The belly is usually paler, cream to grayish, sometimes with light speckling.
Head, eyes & scales
The head is broad and triangular, sharply distinct from the neck, as in all vipers. Eyes are moderately large with vertical pupils suited to low-light activity. Body scales are keeled, producing a rough surface texture, though less exaggerated than in the Spiny Bush Viper — the keels are present but not strongly upturned into spines.
Size & body shape
This is a small snake, generally reaching 40-55 cm (16-22 inches) in length. The body is slender and somewhat compressed side-to-side for grip while climbing, with a prehensile tail used to anchor the snake on branches and vines.
Range & habitat where you'll see it
Broadley's Bush Viper occurs in Central Africa, including parts of Cameroon, the Republic of Congo, and neighboring regions, within lowland and mid-elevation rainforest. It is arboreal, typically found on low shrubs, vine tangles, or branches close to the forest floor in humid, densely vegetated habitat.
How to tell it apart from look-alikes
Broadley's Bush Viper is one of several similar-looking Central African Atheris species, and reliable field distinction from close relatives like the Great Lakes Bush Viper often depends on precise locality and finer scale-count details rather than obvious external markers. In general silhouette, its moderately keeled (not extremely spiny) scales and mottled olive-brown pattern separate it from the much rougher-scaled Spiny Bush Viper and from the more colorful, horn-bearing Usambara Bush Viper.
Frequently asked questions
What does Broadley's Bush Viper look like?
It has an olive-green to brownish-gray body with darker mottling, keeled scales, and a broad triangular head typical of vipers.
How big does it grow?
It is small, typically 40-55 cm (16-22 inches) in total length.
Where is it found?
In Central African rainforests, including Cameroon and the Republic of Congo, in low arboreal vegetation.
Is it as spiny as the Spiny Bush Viper?
No, its scale keels are present but less exaggerated and upturned than those of the Spiny Bush Viper.
How can it be distinguished from similar bush vipers?
It is very similar to close relatives, so locality and moderate (not extreme) scale roughness are the main identification clues.