Rare Keelback Snake Species Documented in Northeast India

Scientists from the Wildlife Institute of India (WII), Dehradun have recently documented two rare keelback snake species in Northeast India. The Rakhine Keelback (“Herpetoreas davidi”) was recorded in Ngengpui Wildlife Sanctuary, while the Kachin Hills Keelback (“Hebius gilhodesi”) was identified in Namdapha National Park and Kamlang Tiger Reserve, highlighting the region’s rich biodiversity.

About keelback snakes

Keelback snakes are generally non-venomous reptiles known for their adaptability to diverse habitats. They are commonly found near water bodies such as streams, wetlands and moist forest areas. Their distribution spans both wet and dry forest environments, making them an important component of forest ecosystems.

Distinctive physical features

A defining characteristic of keelback snakes is their keeled scales. Each scale has a raised ridge along its centre, giving the skin a rough, textured appearance. This feature enhances camouflage by breaking light reflections, allowing the snake to blend effectively with surroundings such as leaf litter, mud and wetland vegetation.

Diet and behaviour

Keelback snakes are carnivorous and primarily feed on frogs, lizards, fish and tadpoles. Their preference for amphibian-rich habitats links them closely to aquatic and semi-aquatic ecosystems. These snakes are usually active in areas with abundant moisture and prey availability.

Important Facts for Exams

• Keelback snakes are typically non-venomous reptiles.
• They are characterised by keeled scales with raised ridges.
• They inhabit moist environments such as wetlands and forests.
• Their presence indicates healthy forest and riparian ecosystems.

Ecological importance

Keelback snakes serve as important ecological indicators, reflecting the health of forest and freshwater ecosystems. The recent documentation of rare species in protected areas of Northeast India underscores the need for continued conservation efforts in these biodiversity-rich regions, which remain vital for sustaining diverse wildlife populations.