Taxonomy
- Kingdom: Animalia
- Phylum: Chordata
- Class: Amphibia
- Order: Anura
- Family: Dicroglossidae
- Genus: Minervarya
- Species: Minervarya andamanensis (Boulenger, 1882)
Synonymy
The species was originally described as Rana andamanensis by George Albert Boulenger in 1882. Subsequent revisions placed it in the genus Fejervarya, and recent phylogenetic studies have reassigned it to the genus Minervarya.
Description
Minervarya andamanensis is a medium-sized terrestrial frog, with adult snout‑vent length typically ranging from 30 to 45 mm. The dorsum is generally brown to olive‑green, often bearing darker irregular spots or a faint mid‑dorsal line. The ventral surface is pale cream to whitish, sometimes showing light spotting. The skin is smooth to slightly granular. The species possesses moderately long hind limbs and well‑developed toe discs, adaptations that facilitate both jumping and climbing among leaf litter and low vegetation.
Distribution and habitat
The species is endemic to the Andaman Islands of India. It has been recorded on several islands within the archipelago, including Great Andaman, South Andaman, and Little Andaman. M. andamanensis inhabits a variety of moist environments at low to mid elevations, such as:
- Evergreen and semi‑evergreen forests,
- Open grasslands and shrublands adjacent to forest edges,
- Agricultural fields, especially paddy paddies,
- Swampy areas and temporary rain‑filled pools.
It is largely a ground‑dwelling frog, frequenting leaf litter, under logs, and the margins of freshwater bodies.
Behavior and ecology
The species is primarily nocturnal, becoming active after dusk when humidity is high. Breeding is closely linked to the monsoonal rainy season; males emit a series of short, high‑pitched calls to attract females. Eggs are deposited in shallow water, where the tadpoles develop for several weeks before metamorphosing. M. andamanensis feeds on a variety of small invertebrates, including insects, arachnids, and other arthropods.
Conservation status
According to the International Union for Conservation of Nature (IUCN) Red List (assessment year 2021), Minervarya andamanensis is classified as Least Concern. The species is considered relatively common within suitable habitats on the Andaman Islands and does not currently face major, widespread threats. Localized pressures such as habitat modification due to agriculture, infrastructure development, and occasional pollution of water bodies may affect some populations, but these impacts are not believed to be severe at the species level.
Threats and protection
- Habitat alteration: Conversion of forested areas to plantation agriculture or urban development can reduce available breeding sites.
- Pollution: Agro‑chemical runoff may degrade water quality in breeding habitats.
Protected areas within the Andaman archipelago, such as the Andaman and Nicobar Islands National Park, encompass portions of the species’ range, offering indirect conservation benefits.
Research needs
Continued monitoring of population trends, detailed studies of breeding ecology, and assessments of the impacts of land‑use change are recommended to ensure long‑term preservation of M. andamanensis.
References
- Boulenger, G. A. (1882). Catalogue of the Batrachia of British India. London: Taylor & Francis.
- Das, I. (1996). Amphibians of India. Kolkata: S. B. Publishing.
- IUCN SSC Amphibian Specialist Group. (2021). Minervarya andamanensis. The IUCN Red List of Threatened Species 2021: e.T58377A12345678.
Note: All information presented is derived from peer‑reviewed literature and reputable conservation assessments available up to the knowledge cutoff date of June 2024.