Taxonomy
- Kingdom: Animalia
- Phylum: Chordata
- Class: Amphibia
- Order: Anura
- Family: Dicroglossidae
- Genus: Nanorana
- Species: Nanorana vicina (Stoliczka, 1872)
Synonyms
- Rana vicina Stoliczka, 1872
Common Names
- Often referred to as the “Kashmir paa frog” or “Himalayan torrent frog” in regional literature.
Physical Description
- Medium‑sized frog, typically 45–65 mm in snout‑vent length.
- Dorsal coloration varies from brown to olive‑green with irregular dark blotches; ventral surface is pale, sometimes mottled.
- Skin on the dorsum is relatively smooth to slightly granular; limbs are robust, adapted for a semi‑aquatic lifestyle.
- Prolonged toe webbing suited to fast‑flowing streams.
Distribution
- Found in the western Himalayas, including northern India (Jammu & Kashmir, Himachal Pradesh), Nepal, and adjacent regions of Bhutan and the Tibetan plateau of China.
Habitat
- Inhabits alpine and sub‑alpine streams, seepages, and adjacent moist meadows at elevations ranging from about 1,500 to 4,000 m above sea level.
- Prefers cold, oxygen‑rich water with rocky substrates; can also be found in temporary pools and wet grasslands near streams.
Ecology and Behavior
- Primarily a stream‑associated species; active during the day (diurnal) and often perched on rocks in shallow water.
- Diet consists of aquatic and terrestrial invertebrates, including insects, larvae, and small crustaceans.
- Breeding occurs in the spring and early summer; females lay eggs in clutches attached to submerged rocks or vegetation in flowing water.
- Tadpoles are adapted to turbulent habitats, possessing a streamlined body and a ventral sucking disc for attachment to substrates.
Conservation Status
- Listed as Least Concern on the IUCN Red List (assessment based on its relatively wide distribution and presumed large population).
- Potential threats include habitat alteration from hydropower development, pollution of mountain streams, and localized water extraction. Conservation actions emphasize monitoring of water quality and protection of key breeding habitats.
Research Notes
- Studies on the species’ genetics have contributed to understanding biogeographic patterns among Himalayan amphibians.
- Monitoring programs in the Indian Himalayas often include Nanorana vicina as an indicator species for alpine stream health.
