Daboia — Old World vipers (Russell's vipers)

Physical characteristics

Daboia vipers are stout-bodied, terrestrial snakes with a broad, triangular head and prominent eyes. Their scales are keeled and their dorsal pattern typically consists of a series of dark, rounded or elliptical blotches running down the back, sometimes with lighter edges. Adults range from medium to moderately large size for viper species and show sexual dimorphism in some populations. Their coloration and pattern provide effective camouflage in dry grassland, scrub and cultivated fields.

Distribution and habitat

Species in this genus occur across South and Southeast Asia and in adjoining regions where suitable habitat exists. They occupy dry and seasonally wet environments, including open fields, scrub, agricultural land, and the margins of human settlements. Because these snakes tolerate disturbed habitats and frequent rodent prey, they are often encountered near farms and villages, increasing the risk of human contact.

Venom and medical importance

Daboia venom is complex and can affect blood coagulation, cause local tissue damage and produce systemic effects such as shock or kidney injury. Envenomings may present with severe bleeding disorders, swelling and pain at the bite site, and other life‑threatening complications. For these reasons Russell's viper and related species are among the medically significant snakes of Asia. Timely medical care, supportive treatment and species-appropriate antivenom substantially improve outcomes.

Behavior and diet

These vipers are primarily terrestrial and feed on small mammals, birds, and occasionally amphibians. Activity patterns vary with climate: they may be diurnal in cooler seasons and more crepuscular or nocturnal in hot conditions. When threatened they may adopt a defensive posture and can deliver a rapid strike. Their tendency to associate with rodent-rich areas brings them into conflict with people.

Taxonomy, history and human interactions

The genus Daboia belongs to the subfamily Viperinae (true vipers). The common name Russell's viper commemorates early natural history work in the Indian subcontinent; Patrick Russell's observations helped Western science recognize and describe many snakes in the region. Today Daboia remains notable for its conservation and public‑health intersections: education, habitat management and access to antivenom are key to reducing bite incidence and severity.

• See also: general information on vipers
• Regional studies and medical guidelines often cite risks from Indian and Southeast Asian venomous snakes
• Further reading and species accounts: taxonomy and distribution