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Colubridae · Global account with Philippine editorial coverage

Reddish Rat Snake

Coelognathus erythrurus(DUMÉRIL, BIBRON & DUMÉRIL, 1854)

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

Coelognathus erythrurus is a Colubridae snake included in the Philippine checklist. Its atlas account links 14 named island or island-group records to the source literature.

OccurrenceConfirmed
Islands named14
Natural history3 sourced topics
References3

Literature updated 2026-10-07 · Editorial review pending

Explore the island records ↓

Species portrait

Coelognathus erythrurus

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

The illustrated collection

Adult & juvenile

Adult · study plate

Coelognathus erythrurus

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Juvenile · study plate

Coelognathus erythrurus

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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.

Contributor images are forthcoming. Photographs and illustrations will retain their individual credits, permissions and evidence notes.

One species · Across borders

Global distribution

Countries and territories named in the checked sources. Island links and country lists use these same occurrence records; a country record does not imply presence on every island.

Checked 7 October 2026. Listed, introduced and uncertain records remain distinct. Islands not yet indexed are not claims of absence. Broad references such as “Borneo” or “New Guinea” are not automatically assigned to every country sharing the island.

Indonesian locality notes and qualifications
Sulawesi
Sulawesi, Buton

Sulawesi/Buton confirmed; Borneo rejected and old Java type locality erroneous.

A closer look

Natural history & identification

Reproduction

The species account records egg-laying reproduction. A verified Philippine clutch-size range, incubation interval and breeding calendar are not established here.

Evidence & scope

Literature documented · Reproduction field

Reproductive mode reported for this named species.

Mode alone does not establish litter or clutch size, seasonal timing, or captive husbandry requirements.

Philippine distribution

The atlas records Coelognathus erythrurus from these named Philippine areas: Luzon, Palawan, Mindanao, Samar, Leyte, Panay, Negros, Cebu, Sibuyan, Jolo, Polillo, Calamian, Camiguin Sur, Balabac. 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

Coelognathus erythrurus is retained in the atlas’s dated checklist under Colubridae. The authority is (DUMÉRIL, BIBRON & DUMÉRIL 1854). 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
Coelognathus erythrurus — all named islandsLuzonPalawanMindanaoSamarLeytePanayNegrosCebuSibuyanJoloPolilloCamiguin SurBalabac

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

14 named islands / island groups

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

Distribution record & sources

Indonesia (Sulawesi, Buton, Borneo), Philippines (Balabac, Bongao, Busvanga, Cebu, Culion, Jolo, Leyte, Luzon , Mindanao, Mindora, Negros, Palawan, Calamian Islands, Panay, Polillo, Samar, Camiguin Sur) celebensis: Indonesia (Sulawesi) manillensis: Luzon, Type locality: “Manille” psephenoura: Philippine Islands (Panay, Cebu, Sibuyan); Type locality: “Barrio Asia, Negros Occidental Province, Negros Island, Philippines”. Type locality: original type locality (DUMÉRIL, BIBRON & DUMÉRIL, 1854) in error, see comment; corrected to Philippines: Samar (Leviton, 1977)

The atlas records Coelognathus erythrurus from these named Philippine areas: Luzon, Palawan, Mindanao, Samar, Leyte, Panay, Negros, Cebu, Sibuyan, Jolo, Polillo, Calamian, Camiguin Sur, Balabac. These are literature areas rather than a continuous range boundary.

The Reptile Database — species checklist, 17 June 2026 ↗Existing checklist occurrence statement and distribution review

Synopsis of the Snakes of the Philippines: A Synthesis of Data from Biodiversity Repositories, Field Studies, and the Literature ↗Existing checklist occurrence statement and distribution review

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 ↗

Coelognathus erythrurus — The Reptile Database species account ↗

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
Coelognathus erythrurus
Common names
Reddish Rat Snake · Philippinen-Kletternatter
Authority
(DUMÉRIL, BIBRON & DUMÉRIL 1854)
Year described
1854
Taxonomic status
Accepted species
Family
Colubridae
Genus
Coelognathus
Species epithet
erythrurus
Persistent ID
PH-SERP-BC625AD318
Checklist checked
2026-09-05

Philippine occurrence

Status
Present
Confidence
Confirmed
Basis
2018 Philippine synopsis treatment plus current RDB listing
Islands named
Luzon, Palawan, Mindanao, Samar, Leyte, Panay, Negros, Cebu, Sibuyan, Jolo, Polillo, Calamian, Camiguin Sur, Balabac

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

Source distribution statement

Indonesia (Sulawesi, Buton, Borneo), Philippines (Balabac, Bongao, Busvanga, Cebu, Culion, Jolo, Leyte, Luzon , Mindanao, Mindora, Negros, Palawan, Calamian Islands, Panay, Polillo, Samar, Camiguin Sur) celebensis: Indonesia (Sulawesi) manillensis: Luzon, Type locality: “Manille” psephenoura: Philippine Islands (Panay, Cebu, Sibuyan); Type locality: “Barrio Asia, Negros Occidental Province, Negros Island, Philippines”. Type locality: original type locality (DUMÉRIL, BIBRON & DUMÉRIL, 1854) in error, see comment; corrected to Philippines: Samar (Leviton, 1977)

Knowledge coverage

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

Names through time

Nomenclatural trail

Plagiodon erythrurus DUMÉRIL, BIBRON & DUMÉRIL 1854: 175 Herpetodryas erythrurus MÜLLER (fide DUMÉRIL, BIBRON & DUMÉRIL 1854) Coluber erythrurus — BOULENGER 1894: 62 Coluber walli WERNER 1924: 34 (fide GEMEL et al. 2019) Elaphe erythrura — SMITH 1931 Elaphe erythrura — SCHULZ 1996: 117 Elaphe erythrura — GAULKE 1999 Coelognathus erythrurus — HELFENBERGER 2001 Coelognathus erythrurus — UTIGER et al. 2002 Coelognathus erythrurus — WALLACH et al. 2014: 171 Coelognathus erythrurus celebensis (JAN 1863) Compsosoma melanurus var. B DUMÉRIL, BIBRON & DUMÉRIL 1854 (nom. nud. fide SAVAGE & MCDIARMID 2018: 53) Elaphis melanurus var. celebensis JAN 1863 Elaphis melanurus var. celebensis — JAN & SORDELLI 1867 Elaphe erythrura celebensis — DE LANG & VOGEL 2005 Elaphe erythrura celebensis — WANGER et al. 2011 Coelognathus erythrurus celebensis — KOCH 2012 Coelognathus erythrurus celebensis — SAVAGE & MCDIARMID 2017: 53 Coelognathus erythrurus manillensis (JAN 1867) Elaphis melanurus var. manillensis JAN 1863 (see comment) Compsosoma melanurus var. C DUMÉRIL, BIBRON & DUMÉRIL 1854 (see comment) [Elaphis melanurus] var. manillensis JAN & SORDELLI 1867: Livr. 21:2 Coelognathus erythrurus manillensis — MCLEOD et al. 2011 Coelognathus erythrura manillensis — DEVAN-SONG & BROWN 2012 Coelognathus erythrurus manillensis — BROWN et al. 2012 Coelognathus erythrurus manillensis — BROWN et al. 2013 Elaphis melanurus var. malinensis — HALLERMANN 2025: 276 (in error) Coelognathus erythrurus manillensis — HALLERMANN 2025: 276 Coelognathus erythrurus psephenourus (LEVITON 1979) Elaphe erythrura psephenoura LEVITON 1979 Coelognathus erythrurus psephenourus — GAULKE 2011: 264 Coelognathus erythrurus psephenoura — SUPSUP et al. 2016 Coelognathus erythrurus psephenourus — PILI & CAGUIMBAL 2018 Coelognathus erythrurus psephenourus — GAULKE 2019: 53

Taxonomic and source notes

The occurrence of E. erythrura on Borneo is doubtful since it can be mixed up with E. flavolineata (SCHULZ 1996). Not on Borneo fide Stuebing et al. 2014. Synonymy: Jan described manillensis in 1863 although the figure (plate) was only published in 1867. Coelognathus erythrurus manillensis is a new name for Compsosoma melanurum var. C of C. Duméril et al. 1854:301. Jan gives credit for the name to the latter authors but they did not propose one. Schulz (1996:119) incorrectly cites Jan, 1863 as the source of this name (SAVAGE & MCDIARMID 2018: 53). In the 1863 TEXT Jan does not mention specimens from MNHN but only Amburgo (= Hamburg) and Neuchatel (Switzerland). Thus the specimen(s) examined by Duméril, Bibron and Duméril are not type(s) since not indicated in the 1863 publication. But note that this 1863 publication does not describe the species and is not valid - nomen nudum since name without description. The scalation characters indicated in the 1863 text refers to the whole species Compsosoma melanurum and not to the new subspecies manillensis. Thus 1867 should be the valid date since the 1867 plate allows recognition of the subspecies compared to others and can be considered as representing the holotype. What remains unclear is if the specimen on the 1867 plate is the one from Manilla in MNHN, the one from Manilla in Hambourg or the one from another locality in Neuchatel (pers. comm., J. Hallermann & I. Ineich, 4 April 2019). Distribution: not on Java (Indonesia) fide de Lang 2017. Original type locality (Indonesia: Java) (based on DUMÉRIL, BIBRON & DUMÉRIL, 1854) in error.

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 ↗
n.d.

Coelognathus erythrurus — The Reptile Database species account

Uetz, P.; Hallermann, J. et al. (editors)

Public species fields consulted for bounded biological summaries. Primary sources quoted within the database were not independently examined unless explicitly stated. The catalogue name may differ from the current source title.

Open source ↗