Puff Adder

What is a puff adder?

The puff adder (Bitis arietans) is a large, stocky, and highly venomous snake native to sub-Saharan Africa and parts of the Arabian peninsula. It is named for its defensive behavior of inflating its body and hissing loudly when threatened.¹²

Characterized by a flat, triangular head and dull, camouflaging scales, the puff adder typically grows to about 1 meter in length. While it possesses potent venom, it often kills prey—such as rodents, birds, and lizards—through the sheer force of its strike. Although responsible for many snakebites in Africa, fatalities are relatively rare; bites more commonly result in severe pain, blistering, and tissue damage.¹

The species is classified as of least concern by the IUCN, though it is frequently killed by humans who view it as a pest. The term “puff adder” is also used for several other species within the genus Bitis, such as the Gaboon viper and rhinoceros viper.¹³

Where do puff adders live?

Puff adders (Bitis arietans) are primarily found in the semiarid regions of sub-Saharan Africa and along the western and southern coastal areas of the Arabian Peninsula.¹⁴

These snakes are highly adaptable to various environments within these regions, utilizing their concealing coloration to blend into desert terrain, including rocks, sand, dry twigs, and grasses. While they are common throughout most of their range, they are considered rare in a small population located in Morocco.¹

What does a puff adder look like?

The puff adder (Bitis arietans) is a large, stocky snake characterized by a flat, triangular head and long fangs that can reach up to 5 cm (about 2 inches) in length.²

Its appearance is defined by:

• Size: While some adults reach 1.5 meters (4.9 feet), most are typically around 1 meter (3.3 feet) long and weigh between 4.5 and 6.8 kg.²
• Coloration: The snake features dull-colored scales ranging from sandy tan to gray or dark brown. These scales create distinct yellowish U- or V-shaped patterns along its back, which provide effective concealing coloration against sand, rocks, and grasses.²
• Underside: The scales on the snake’s belly are lighter in color than those on its back.²

When threatened, the puff adder is known to inflate its body with air and hiss loudly, a defensive behavior that gives the species its name.²

How does the puff adder defend itself from enemies?

The puff adder (Bitis arietans) employs several defensive strategies to protect itself from predators such as honey badgers, secretary birds, and various birds of prey.¹

Its primary defense mechanisms include:

• Inflation and Hissing: When threatened, the snake inflates its body with air and emits a loud hiss to discourage potential attackers.¹
• Camouflage: The puff adder utilizes concealing coloration to blend into its environment, including sand, rocks, and grasses.¹
• Stealth and Odor Control: The snake may remain completely motionless while predators are nearby and can produce a chemical that renders it odorless, making it harder for predators to detect.¹

These behaviors, combined with its menacing demeanor, help the puff adder survive in its natural habitat.¹