Species Identity and Record Status
The king cobra (Ophiophagus hannah) is the world's longest venomous snake, with verified individuals exceeding 18 feet in length. It is classified in the family Elapidae and is distinct from true cobras in the genus Naja. The species is recognized by leading herpetological research institutions and conservation databases as the longest venomous snake on Earth, with size records documented in Southeast Asian field studies and zoo collections.
Adult king cobras typically range from 10 to 13 feet, but exceptional specimens have been measured above 18 feet. The longest scientifically measured individuals were recorded in protected forests and snake research centers across South and Southeast Asia. These measurements are based on standardized field protocols and museum specimens, and they place the king cobra at the top of the global ranking for venomous snake length.
Habitat, Distribution, and Behavior
The king cobra inhabits forests, bamboo thickets, and riparian zones across India, Southeast Asia, and parts of southern China. It prefers dense cover near water sources and is often found in tropical and subtropical ecosystems. Its range spans countries such as India, Myanmar, Thailand, Vietnam, Malaysia, Indonesia, and the Philippines, where it occupies lowland and hill forests up to moderate elevations.
Unlike many venomous snakes, the king cobra builds a nest for its eggs, a rare behavior among snakes. Females construct mound-like nests from leaf litter and guard them during incubation. The species is diurnal and feeds primarily on other snakes, including venomous species, but also consumes lizards and small mammals. It is listed on CITES Appendix II, and international trade is regulated to support population monitoring and habitat protection.
Venom, Threat Level, and Conservation
The king cobra delivers a large volume of potent neurotoxic venom in a single bite, enough to kill an elephant or 20 humans. Its venom targets the nervous system, causing respiratory failure and paralysis if untreated. Antivenom is produced in several countries, and clinical protocols emphasize rapid airway management and supportive care in hospital settings.
King cobra populations are declining due to habitat loss, deforestation, and illegal collection for the wildlife trade. The species is listed as Vulnerable on the IUCN Red List, and several range countries have enacted national protections. Conservation programs focus on habitat preservation, anti-poaching enforcement, and public education, with research supported by global biodiversity initiatives and partnerships with organizations such as the Smithsonian's National Zoo and Conservation Biology Institute https://nationalzoo.si.edu/animals/king-cobra and the IUCN Red List of Threatened Species https://www.iucnredlist.org/species/190572/1321535.