The Andaman wild pig is an example of why an evocative species story should not outrun its evidence. A nineteenth-century name, Sus andamanensis, was applied to pigs from Port Blair. Later authors treated the form as a subspecies of the widespread wild boar, Sus scrofa. The American Society of Mammalogists’ Mammal Diversity Database currently lists S. andamanensis as a synonym under the domestic pig entry, reflecting a taxonomic treatment rather than a claim that pigs vanished from the islands.
Indian government and research sources continue to use “Andaman wild pig” or Sus scrofa andamanensis for island animals. A 2025 National Tiger Conservation Authority report says pigs on the Andaman and Nicobar Islands have gone feral and developed long-snouted and short-snouted forms. The Andaman and Nicobar administration also lists the Andaman wild pig among local mammals. These sources disagree in naming and classification, but they do not support the claim that the animal has disappeared without witnesses.
| Historical name | Sus andamanensis |
|---|---|
| Current database treatment | Synonym in the Mammal Diversity Database |
| Island records | Wild, feral and managed pig populations are reported |
| Population count | No reliable modern census of a distinct endemic form located |
Evidence note: taxonomy is disputed, and abundance is poorly measured
The name Sus andamanensis is treated as a synonym in the current Mammal Diversity Database. Other Indian sources retain the name for island pigs and describe feral or locally managed populations. No modern, methodologically clear census was located for a distinct endemic population, so neither extinction nor a secure conservation status should be asserted from these records alone.
How a name became a conservation claim
Island mammals are often described through names created during early natural-history collecting. A short description, a few specimens and a type locality can establish a scientific name, but those facts do not automatically prove that the named population was a separate evolutionary species. Later taxonomists compare anatomy, geography and genetics and may retain, combine or synonymise names.
For Andaman pigs, historical accounts described a smaller animal with a short tail and other features that seemed distinct from mainland wild boar. The name was subsequently used in several ways, including as a subspecies. Modern sources also refer to pig populations that have become feral on the islands, and to local pig breeds kept by communities. “Wild pig” can therefore refer to a taxonomic form, a free-ranging feral animal or a domestic population managed in extensive conditions. Those categories are not interchangeable.
Genetic studies add evidence but do not instantly settle the question. A 2025 study of Indian pig populations reported genetic relationships involving Andaman and Nicobar samples, while its main scope was the origins and diversity of Indian domestic pigs. Such a study can inform ancestry and population history; it is not a census of wild pigs, nor by itself a formal redescription of an endemic wild subspecies.
What the available records actually say
The National Tiger Conservation Authority’s 2025 ungulate report places island pigs within the broad wild boar account and describes long-snouted and short-snouted forms after feralisation. The regional forest department’s web pages list Andaman wild pigs among the islands’ mammals. Agricultural research institutions also document local pigs as a genetic resource and describe husbandry that can be free-ranging or semi-feral.
Together these records show that pig populations are present and that people have observed different forms. They do not tell us how many genuinely wild animals remain, whether the island forms are genetically distinct from domestic and feral pigs, or whether every named population persists on each island. The right conclusion is not that all forms are thriving. It is that the available evidence is insufficient to support a confident disappearance claim.
Why island history complicates the picture
The Andaman and Nicobar Islands have a long history of human movement, settlement and animal husbandry. Domestic pigs may escape, be released or be managed outside enclosed farms. Over generations, free-ranging animals can acquire traits associated with local environments, while continued contact with domestic stock can blur the boundary between wild and managed populations. Island biogeography alone does not prove that every local form is an ancient endemic lineage.
That complexity has conservation consequences. If a distinctive wild population exists, it may deserve protection from hunting, habitat loss and genetic swamping. If records instead describe feral pigs, their effects on native ecosystems may require control. Managers need clear identification and field surveys before choosing between those goals. A blanket label can obscure the actual question that monitoring should answer.
What research would resolve the uncertainty?
A modern assessment would combine camera traps and field surveys across multiple islands with genetic sampling of free-ranging, managed and domestic animals. Museum specimens and older descriptions could be compared with contemporary material. Researchers would need to record where samples came from and how animals were classified, then publish enough methods for others to evaluate the result. A reliable population estimate would require repeatable survey design, not anecdotal sightings.
Until then, a responsible account keeps the uncertainty visible. The historical name is real, the taxonomic treatment is contested across sources, and pigs still occur on the islands. None of those statements proves that a unique endemic subspecies is secure; none proves it extinct either.
The distinction resembles a different island conservation challenge: the Floreana tortoise restoration makes a careful separation between genetic ancestry and the return of an extinct original lineage. For Andaman pigs, the first task is earlier in the evidence chain: determine which animals are present and what population the name refers to before announcing a loss or a recovery.
Frequently asked questions
Is the Andaman wild pig extinct?
The available evidence does not establish that. Indian government sources report wild or feral pigs on the islands, while reliable modern surveys of a distinct endemic form are lacking.
Is Sus andamanensis a separate species?
Taxonomic treatment varies. The Mammal Diversity Database lists the name as a synonym, while some Indian sources continue to use it for Andaman wild pigs or a subspecies.
What do long-snouted and short-snouted pigs mean?
A 2025 Indian government report describes these forms among pigs that have gone feral on the Andaman and Nicobar Islands. The labels alone do not establish separate species or population sizes.
What would show whether a distinct Andaman population survives?
Researchers would need island-wide repeat surveys, genetic comparisons among wild, feral and managed pigs, and a clear taxonomic assessment using historical specimens and current evidence.