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Acrochordidae · Global account with Philippine editorial coverage

Little filesnake

Acrochordus granulatus(SCHNEIDER, 1799)

Length
Length not yet addedAtlas entry awaiting completion
Venom status
Venom classification not yet addedHuman effects: atlas summary awaiting completion
Known venom effects
Effects not yet summarised in this atlas

An aquatic fish-eater found in coastal habitats and, in the Philippines, freshwater Lake Taal. Its ecology is distinct from that of the venomous elapid sea snakes.

OccurrenceConfirmed
Islands named5
Natural history5 sourced topics
References4

Literature updated 2026-10-07 · Editorial review pending

Explore the island records ↓

The illustrated collection

Adult & juvenile

Adult · study plate

Acrochordus granulatus

Image to follow
Reserved for a contributor imageCredit and usage rights will accompany the image.

Juvenile · study plate

Acrochordus granulatus

Image to follow
Reserved for a contributor imageCredit and usage rights will accompany the image.

Life stages will be labelled from the contributor’s information. Images alone do not establish identification or a locality record.

Media provenance

Every image carries its source.

Acrochordus granulatus

Type
Illustration
Credit
Mario Lutz
Usage rights
Copyright Mario Lutz. Authorised for display in this atlas; no third-party reuse licence granted.
Evidence status
Illustration; not a specimen or occurrence record.

Acrochordus granulatus Portrait

Type
Illustration
Credit
Mario Lutz
Usage rights
Copyright Mario Lutz. Authorised for display in this atlas; no third-party reuse licence granted.
Evidence status
Illustration; not a specimen or occurrence record.

One species · Across borders

Global distribution

Explore the recorded countries and islands. Select a highlighted area to see its distribution evidence.

Recorded distribution

Loading geographic boundaries…

ListedIntroducedUncertain

Click a highlighted country to zoom in and explore its records.

Shading identifies recorded countries or named islands, not continuous habitat coverage. Uncoloured areas do not establish absence.

Natural Earth · 1:50m · public domain. Small islands may lack an outline.

Explore the distribution

Across borders

15 recorded countries & territories

Select a highlighted area to see its status, island records and sources. Each country and island links to the same shared species collection.

Use “Worldwide records” to include distant introduced and uncertain records in the map view.

Indonesian locality notes and qualifications
Sumatra
Sumatra
Java & Bali
Java, Bali
Kalimantan
Borneo
Sulawesi
Sulawesi
Lesser Sundas
Flores, Timor, Komodo
Maluku
Ambon, Ternate
Papua
Irian Jaya, Jobi, Schouten, Papua

Source explicitly lists Indonesian occurrence; no contrary country-level exclusion in Comment.

A closer look

Natural history & identification

Ecology & habitat

Uses estuaries, muddy shores and mangroves. A Thai study examined 119 animals from Phangnga Bay.

Evidence & scope

Literature documented · Repository abstract

Thailand, 2002; comparative habitat data.

Diet & foraging

Gobies occur in the diet of the Lake Taal population, overlapping with prey of Hydrophis semperi.

Evidence & scope

Literature documented · Abstract; Table 1

Philippine gut-content study.

Shared prey does not demonstrate competition.

Reproduction

Developing embryos were present in January and full-term embryos in May in the Phangnga Bay sample. Young were first captured in June. Larger mothers carried more offspring.

Evidence & scope

Literature documented · Repository abstract

Thailand, January–December 2002.

This seasonal sequence is not a Philippine breeding calendar.

Philippine distribution

The atlas records Acrochordus granulatus from these named Philippine areas: Luzon, Palawan, Panay, Cebu, Calamian. These are literature areas rather than a continuous range boundary.

Evidence & scope

Literature documented · Existing checklist occurrence statement and distribution review

The original evidence level is retained.

A country listing cannot establish an island or a precise locality.

Taxonomic context

Acrochordus granulatus is retained in the atlas’s dated checklist under Acrochordidae. The authority is (SCHNEIDER 1799). Earlier names and the original source notes are preserved below for comparison.

Evidence & scope

Literature documented · Checklist identity and nomenclatural trail

Checklist verified 2026-09-05; not a newly revised taxonomic backbone.

Historical names can cover different biological concepts; synonyms should not be used to transfer records automatically.

Across the archipelago

Where this species is recorded

Philippines
Acrochordus granulatus — all named islandsLuzonPalawanPanayCebu

Documented islands: gold · island groups: dashed circles

Island-level records · not continuous habitat coverage. Dashed circles locate groups, not individual observations.

Philippine distribution

Documented places

5 named islands / island groups

Select an island to read its distribution record and sources. Uncoloured islands are not evidence of absence.

Distribution record & sources

China (Hainan), Australia (along the coast of Northern Territory, Queensland, Western Australia) Indonesia (Ambon, Borneo, Flores, Irian Jaya, Java, Bali, Jobi, Schouten, Sulawesi, Sumatra, Ternate, Timor, We, Komodo); Timor-Leste; Cambodia; India (Kerala, Gujarat, including Nicobar Islands); Malaysia (Malaya and East Malaysia); Myanmar (Burma); Philippines (including Palawan: Calamian Islands, Panay, Luzon, Cebu); Singapore; Sri Lanka, Thailand; Vietnam. Papua New Guinea (including many satellite islands), Solomon Islands Type locality: not given (fide MANTHEY & GROSSMANN 1997); “Madras, India” (fide SANG et al. 2009)

References attached to this species account. Island-specific evidence is shown separately where available.

The Reptile Database — species checklist, 17 June 2026 ↗

Synopsis of the Snakes of the Philippines: A Synthesis of Data from Biodiversity Repositories, Field Studies, and the Literature ↗

Food Habits and Distribution of the Lake Taal Sea Snake (Hydrophis semperi Garman 1881) and the Sympatric Little File Snake (Acrochordus granulatus Schneider 1799) in Lake Taal, Philippines ↗

Morphology, reproductive biology and ecology of the little file snake, Acrochordus granulatus at Phangnga Bay, Thailand ↗

Living with wildlife

Give this snake space.

Venom classification not yet added · Effects not yet summarised in this atlas

Observe from a distance. Do not handle, corner or capture a snake to identify it. An incomplete venom account is not evidence that a species is safe to handle.

After a suspected snakebite, keep the person still and arrange urgent medical care. Avoid tight tourniquets, cutting, suction and unproven remedies. Do not wait to identify the snake before seeking help.

WHO guidance on snakebite first aid

Species record

Taxonomy, occurrence & evidence.

Identity

Accepted name
Acrochordus granulatus
Common names
Little filesnake, Marine File Snake, Wart Snake · Warzenschlange, Südostasiatische Warzenschlange · Chinese: 瘰鳞蛇
Authority
(SCHNEIDER 1799)
Year described
1799
Taxonomic status
Accepted species
Family
Acrochordidae
Genus
Acrochordus
Species epithet
granulatus
Persistent ID
PH-SERP-3AEC18D223
Checklist checked
2026-09-05

Philippine occurrence

Status
Present
Confidence
Confirmed
Basis
2018 Philippine synopsis treatment plus current RDB listing
Islands named
Luzon, Palawan, Panay, Cebu, Calamian

Range noteCountry/island text is not a range polygon or locality record.

Source distribution statement

China (Hainan), Australia (along the coast of Northern Territory, Queensland, Western Australia) Indonesia (Ambon, Borneo, Flores, Irian Jaya, Java, Bali, Jobi, Schouten, Sulawesi, Sumatra, Ternate, Timor, We, Komodo); Timor-Leste; Cambodia; India (Kerala, Gujarat, including Nicobar Islands); Malaysia (Malaya and East Malaysia); Myanmar (Burma); Philippines (including Palawan: Calamian Islands, Panay, Luzon, Cebu); Singapore; Sri Lanka, Thailand; Vietnam. Papua New Guinea (including many satellite islands), Solomon Islands Type locality: not given (fide MANTHEY & GROSSMANN 1997); “Madras, India” (fide SANG et al. 2009)

Knowledge coverage

EndemismResearch pending
EcologyLiterature documented
VenomVenom classification not yet added
Effects not yet summarised in this atlas
Detailed research: Research pending
ConservationResearch pending

Names through time

Nomenclatural trail

Hydrus Granulatus SCHNEIDER 1799: 243 Acrochordus fasciatus SHAW 1802 Pelamis granulatus — DAUDIN 1803 Chersydrus [fasciatus] — CUVIER 1817: 532 Chersydrus granulatus — MERREM 1820: 138 Acrochordus fasciatus — RAFFLES 1822 Hydrus granulatus — RAFFLES 1822 Acrochordus granulatus — CANTOR 1847 Chersydrus annulatus GRAY 1849 Chersydrus fasciatus — DUMÉRIL & BIBRON 1854: 41 Chersydrus fasciatus — JAN 1863 Chersydrus granulatus — ANDERSON 1872 Chersydrus granulatus — BOULENGER 1893: 174 Chersydrus granulatus — DE ROOIJ 1917: 43 Chersydrus granulatus — WALL 1921: 79 Chersydrus granulatus — TAYLOR 1922 Chersydrus granulatus granulatus — LOVERIDGE 1938: 209 Chersydrus granulatus luzonensis LOVERIDGE 1938: 209 Acrochordus granulatus granulatus — HAAS 1950 Chersydrus granulatus — GRUBER in GRZIMEK 1970 Chersydrus granulatus — GRANDISON 1978: 285 Acrochordus granulatus — MCDOWELL 1979: 79 Acrochordus granulatus — MANTHEY & GROSSMANN 1997: 296 Acrochordus granulatus — COX et al. 1998: 17 Acrochordus granulatus — GAULKE 1999 Acrochordus granulatus — MCDIARMID, CAMPBELL & TOURÉ 1999: 227 Chersydrus granulatus — SHARMA 2004 Acrochordus granulatus — MURTHY 2010 Acrochordus granulatus — COX et al. 2012: 67 Acrochordus granulatus — WALLACH et al. 2014: 7 Acrochordus granulatus — EIPPER & EIPPER 2024: 27

Taxonomic and source notes

Distribution: Does not occur in Pakistan fide KHAN (pers. comm.). There is one record from Japan (Amami-oshima Island, Ryukyu Archipelago); however, this is dubious and the specimen may have been introduced (Takata et al. 2023, I. Fukuyama, pers. comm., 22 Sep 2024). Not in Bangladesh fide Al Haidar et al. 2025. Genome: Roberts et al. 2024.

References attached to this record

2026

The Reptile Database — species checklist, 17 June 2026

Uetz, P.; Freed, P.; Aguilar, R.; Reyes, F.; Kudera, J.; Hošek, J. (eds.)

Open source ↗
2018

Synopsis of the Snakes of the Philippines: A Synthesis of Data from Biodiversity Repositories, Field Studies, and the Literature

Leviton, A. E.; Siler, C. D.; Weinell, J. L.; Brown, R. M.

Proceedings of the California Academy of Sciences 64(14): 399–568

DOI: 10.5281/zenodo.11512589

Open source ↗
2014

Food Habits and Distribution of the Lake Taal Sea Snake (Hydrophis semperi Garman 1881) and the Sympatric Little File Snake (Acrochordus granulatus Schneider 1799) in Lake Taal, Philippines

Garcia, V. O. S.; Papa, R. D. S.; Briones, J. C. A.; Mendoza, N.; Okuda, N.; Diesmos, A. C.

Asian Herpetological Research 5(4): 255–262

DOI: 10.3724/SP.J.1245.2014.00255

Author-uploaded full text consulted; gut contents and stable isotopes are distinguished.

Open source ↗
2004

Morphology, reproductive biology and ecology of the little file snake, Acrochordus granulatus at Phangnga Bay, Thailand

Wangkulangkul, S.

PhD thesis, Chulalongkorn University

DOI: 10.58837/CHULA.THE.2004.977

Repository abstract consulted; 119 snakes sampled in 2002. Thai comparative data.

Open source ↗