FaunaHub

Snake

ReptileSquamateCarnivore

Corn snake (Pantherophis guttatus) on sandy ground at Sapelo Island, Georgia.

Corn snake (Pantherophis guttatus), a non-venomous North American colubrid often used as a reference species.

Image: Judy Gallagher, CC BY 2.0, via Wikimedia Commons.

Overview

Snakes are limbless reptiles of the suborder Serpentes — a highly diverse group of squamate reptiles distributed across almost every continent except Antarctica. Body sizes range from very small thread snakes to the very large pythons, boas, and anacondas. Snakes share a clearly recognisable body plan: an elongated trunk, no functional limbs, paired internal organs arranged in series along the body, and a forked tongue used for chemosensation.

Habitat & Range

Snakes occupy nearly every terrestrial habitat — forest, desert, grassland, wetland — and several lineages are highly aquatic or even fully marine. Specific habitat preferences vary widely by species; reference species accounts are the appropriate source for any specific snake.

Diet

All snakes are carnivorous. Prey ranges from invertebrates and small amphibians in the smaller species to large mammals in constrictors such as some pythons. Some snake species are venomous and use venom to subdue prey; others kill by constriction or simply by ingestion. Diet specifics vary sharply by species.

Behavior

Most snakes are solitary outside the breeding season. Activity patterns vary widely — many temperate species are diurnal in cool weather and shift to nocturnal activity in summer heat. Snakes shed their skin periodically (ecdysis), reproduce by laying eggs or by giving birth to live young depending on the species, and use the Jacobson's organ together with their forked tongue for an unusually directional sense of smell.

Human Interaction & Conservation

Snakebite remains a serious public-health issue in many parts of the world. The World Health Organization classifies snakebite envenoming as a neglected tropical disease. FaunaHub does not provide first-aid instructions. In the event of any snakebite, contact local emergency medical services and follow their guidance; do not rely on internet first-aid summaries or traditional remedies. Pet snake keeping is legal in many jurisdictions but is regulated for venomous and large constrictor species in most places.

Similar Animals

Other squamate reptiles include lizards. Worm-like amphibians such as caecilians and several legless lizard species superficially resemble snakes but are not related at any close evolutionary level. The corn snake used as a reference image is one of several popular non-venomous pet species.

Frequently Asked Questions — Snake

Are all snakes venomous?
No. Most snake species are not medically significant to humans. A subset — including elapids, vipers, and some colubrids — produce venom of varying medical importance. Identifying any specific snake should be left to a qualified expert.
What should I do if a snake bites me?
Treat any snakebite as a medical emergency. Contact local emergency services and follow their guidance. Do not apply tourniquets, attempt to suck out venom, or use traditional or internet first-aid remedies, which can cause additional injury. Medical centres in venomous-snake regions follow standardised treatment protocols.
Can snakes be good pets?
Some non-venomous species — particularly captive-bred corn snakes, ball pythons, and garter snakes — are commonly kept as pets in many regions. Responsible ownership requires species-appropriate enclosures, temperature gradients, feeding schedules, and an exotic-animal veterinarian. Wild capture should be avoided. Verify local law before acquiring any reptile.
How long do snakes live?
Lifespan varies considerably by species and individual. Many commonly kept pet species can live well over a decade in good captive conditions. Wild lifespan is typically shorter due to predation and other pressures.

Sources and further reading

Authoritative wildlife references used for general educational context. Conservation status should always be verified against current IUCN Red List data. External links open in a new tab.