India is home to 13,703 species of lepidoptera, about 8.25% of all known species of butterflies and moths
The Zoological Survey of India (ZSI) has completed the country's first comprehensive national catalogue of Lepidoptera (butterflies and moths), documenting 13,703 species found in India.
The work, led by ZSI scientists over nearly 12 years, involved field exploration, museum specimen curation, and rigorous cross-verification against more than a century of scattered taxonomic literature.
The finished catalogue consolidated a 22-volume series and resolved long-standing taxonomic ambiguities, enabling the classification of over 1,600 previously unresolved species records.
India's 13,703 documented lepidopteran species represent approximately 8.25% of all known butterfly and moth species recorded worldwide, underscoring the country's status as a global biodiversity hotspot for this insect order.
Zoological Survey of India (ZSI): Mandate and Role in Biodiversity Documentation
ZSI is India's premier organisation for zoological taxonomy and survey work, functioning under the Ministry of Environment, Forest and Climate Change. Its core mandate is exploration, survey, and taxonomic research to document the diversity and distribution of India's fauna — foundational work that underpins conservation planning, protected-area management, and India's obligations under international biodiversity frameworks.
Key Details
- Founded on 1 July 1916, evolving out of the Zoological Section of the Indian Museum, Calcutta (established 1875); headquartered in Kolkata with 16 regional centres.
- Its National Zoological Collections hold over 5.8 million specimens covering roughly 60,000 species, including species from neighbouring countries.
- The lepidoptera catalogue is a flagship output of this taxonomic mandate, published as a special issue of the international journal Zootaxa.
The 13,703-species catalogue is precisely the kind of foundational taxonomic exercise ZSI exists to perform — without an authoritative, verified species list, conservation prioritisation (which species need legal protection, which regions are hotspots) cannot proceed scientifically.
IUCN Red List Categories and Their Use in Conservation Prioritisation
The IUCN Red List is the global standard for assessing extinction risk, assigning species to categories based on population decline rate, population size, and range. Comprehensive species cataloguing exercises like ZSI's Lepidoptera catalogue are a prerequisite for such assessments — a species cannot be accurately risk-assessed until it is taxonomically confirmed and its distribution is documented.
Key Details
- Critically Endangered (CR): population decline of 80%+ over 10 years/3 generations, or fewer than 50 mature individuals remaining.
- Endangered (EN): decline of 50–70%, or fewer than 250 mature individuals.
- Vulnerable (VU): decline of 30–50%, or fewer than 1,000 mature individuals.
- Near Threatened (NT): close to qualifying for a threatened category but not yet meeting the criteria.
A verified national inventory like ZSI's catalogue is the data backbone that eventually feeds IUCN Red List assessments and India's own conservation-status reviews for moths and butterflies, many of which remain data-deficient without such baseline taxonomic work.
Wildlife (Protection) Act, 1972 — Schedules Covering Insects
The Wildlife (Protection) Act, 1972 defines "wildlife" to explicitly include insects such as butterflies and moths, and extends legal protection to select species through its Schedules. The 2022 amendment simplified the earlier six-schedule structure into four schedules to align India's domestic framework with CITES (Convention on International Trade in Endangered Species).
Key Details
- Post-2022 amendment: Schedule I (highest protection, including critically endangered species) and Schedule II (lesser degree of protection) cover animals, including select butterfly and moth species; Schedule III covers plants; Schedule IV covers species listed under CITES Appendices.
- Offences against Schedule I species attract imprisonment of one to six years and a minimum fine, reflecting the highest protection tier.
- Several charismatic Indian butterfly species (e.g., certain swallowtail species) are listed under Schedule I/II, restricting their hunting, trade, and possession.
Accurate species-level cataloguing, as achieved by ZSI's 12-year project, is a precondition for correctly placing lepidopteran species into the Act's Schedules — misidentified or undocumented species cannot be legally protected, so taxonomic clarity directly strengthens enforcement under the 1972 Act.
- India hosts 13,703 documented species of Lepidoptera (butterflies and moths), about 8.25% of all known species worldwide.
- The cataloguing project took nearly 12 years, combining field exploration, museum curation, and literature verification, and was published as a 22-volume series in Zootaxa.
- The exercise resolved classification for over 1,600 previously ambiguous species records.
- ZSI, the body behind the catalogue, was founded in 1916 and functions under the Ministry of Environment, Forest and Climate Change; its collections span roughly 60,000 species.
- The Wildlife (Protection) Act, 1972 (as amended in 2022) now has four Schedules, with Schedule I/II covering protected insect species including select butterflies and moths.