Identification
The Puff Adder (*Bitis arietans*) is the "heavyweight" of the African bush. Stout and muscular, it typically reaches 1 meter in length, though its girth makes it appear much larger. Its most defining field marks are the dark, backward-pointing chevrons (V-shapes) that run down its spine, contrasted against a background of dull yellow, olive, or brown. Its head is distinctly triangular with a blunt snout and covered in small, heavily keeled scales that give it a rough, matte texture. Unlike the geometric, quilt-like patterns of the Gaboon Viper, the Puff Adder’s camouflage is designed to melt into dry leaf litter and parched grass.
Habitat & Range
This is Africa’s most widespread venomous snake, ranging from the southern Cape all the way to the Arabian Peninsula. It is a generalist, thriving in savannas, grasslands, and even high-altitude montane heaths up to 2,000 meters. However, you won't find them in true rainforests or hyper-arid sandy deserts; they prefer "edge" habitats where cover is plentiful.
Behaviour
Observers usually find them coiled in a tight "S" shape, perfectly still. They are primarily nocturnal and rely on extreme crypsis. While most snakes flee from footsteps, the Puff Adder stands its ground, trusting its camouflage. If pushed, it inflates its body and lets out a terrifyingly loud, hollow hiss. They are famous for their rectilinear motion—moving in a straight line like a caterpillar—rather than the typical serpentine wiggle.
Diet
A classic ambush predator, it sits motionless for days near rodent runs. While rodents are the primary target, they also take ground-nesting birds, toads, and lizards. They strike with lightning speed—one of the fastest recorded in the snake world—envenomating prey and then tracking the scent trail once the animal expires.
Fascinating Fact
The Puff Adder is a ghost to the nose: it possesses "chemical crypsis." Research has shown that even highly trained scent-detection dogs and wild predators like mongooses cannot smell a Puff Adder, even when standing directly over it. It is one of the only land predators known to be virtually scentless.