This article is about the viper species "common puff adder", native to Africa. For the viper subfamily commonly known as "puff-adders", see 
Bitis. For the non-venomous snake native to North America, colloquially known as "puff adder", see 
Heterodon. For the Marvel Comics character, see 
Puff Adder (character).
| Puff adder | 
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| Scientific classification | 
| Domain: | Eukaryota | 
 
| Kingdom: | Animalia | 
 
| Phylum: | Chordata | 
 
| Class: | Reptilia | 
 
| Order: | Squamata | 
 
| Suborder: | Serpentes | 
 
| Family: | Viperidae | 
 
| Genus: | Bitis | 
| Species: | B. arietans | 
| Binomial name | 
| Bitis arietans 
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|    native range | 
| Synonyms | 
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Cobra lachesis Laurenti, 1768
Cobra clotho Laurenti, 1768
Coluber lachesis — Gmelin, 1788
Coluber clotho — Gmelin, 1788
Coluber bitin Bonnaterre, 1790
Coluber intumescens Donndorff, 1798
Vipera severa Latreille In Sonnini & Latreille, 1801
Vipera (Echidna) arietans Merrem, 1820
Vipera inflata Burchell, 1822
Echidna arietans — Wagler, 1828
Vipera brachyura Cuvier, 1829
Vipera arietans — Schlegel, 1837
Clotho (Bitis) arietans — Gray, 1842
Clotho (Bitis) lateristriga Gray, 1842
Echidna arietans — A.M.C. Duméril, Bibron & A.H.A. Duméril, 1854
Bitis arietans — Günther, 1858
Bitis arietans — Boulenger, 1896
Cobra lachesis — Mertens, 1937
Bitis lachesis — Mertens, 1938
Bitis lachesis lachesis — de Witte, 1953
Bitis arietans arietans — Loveridge, 1953
Bitis arietans peghullae Steward, 1973
Bitis arietans — Golay et al., 1993
Vipera (Clotho) arietans — Herprint Int'l, 1994
Bitis arietans — Spawls & Branch, 1995
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The puff adder (Bitis arietans) is a highly venomous viper species found in savannahs and grasslands from Morocco and western Arabia throughout Africa except for the Sahara and rainforest regions. It is responsible for causing the most snakebite fatalities in Africa owing to various factors, such as its wide distribution, frequent occurrence in highly populated regions, and aggressive disposition. Like all other vipers, it is venomous. Two subspecies are currently recognized, including the nominate subspecies described here.
The species is commonly known as the puff adder, African puff adder, or common puff adder.