Island atlas · Landscapes & species
Sulu
17 species records name Sulu. Explore their natural history, taxonomic history and distribution sources.
Bud Dajo on Jolo, one of the major islands of the Sulu Archipelago.
Photo: Icefirexd · Original photograph · CC BY-SA 4.0. Displayed to fit the frame.
Beyond the species list
A sense of place.
The Sulu Archipelago forms a chain across the southwestern Philippines, between the Sulu Sea and the Celebes Sea. Its major islands include Basilan, Jolo and Tawi-Tawi, together with many smaller islands.
Landscape & habitats
The chain contains a variety of island landforms rather than one continuous habitat. Bud Dajo on Jolo, pictured above, illustrates its volcanic scenery; the forested terrain of Tawi-Tawi provides another setting within the broader archipelago.
Sulu is retained as a broad source label. An archipelago-level mention is not reassigned to Jolo, Basilan or Tawi-Tawi without more specific evidence.
Geographic sources
- Sulu Archipelago — geographic overview ↗
- Jolo — volcanic terrain ↗
- Key Biodiversity Areas — Tawi-tawi Island ↗
Geographic overview checked 7 October 2026. The photograph illustrates a landscape, not a snake observation.
Islands, barriers & evolution
Zoogeography
An island chain with unresolved faunal relationships
The Sulu Archipelago occupies the space between Mindanao and Borneo, but it is not a single uniform animal community. Philippine biogeographic treatments distinguish the Sulu island group from the major island complexes and emphasise its research gaps.
Historical collections provide important evidence, yet limited subsequent surveys and wartime specimen losses leave some evolutionary relationships uncertain. The chain is a setting in which to investigate dispersal and endemism, not evidence by itself for a continuous land bridge or the presence of a species on every island.
How to read the historical island groups
During Pleistocene glacial periods, lower sea levels exposed shallow seabeds and joined some present-day islands. Biogeographers call these reconstructed landmasses Pleistocene Aggregate Island Complexes (PAICs). Deep channels continued to separate others. This model helps explain regional similarities, but dispersal, older geology and habitat differences also shaped each fauna.
“Endemic” means restricted to a stated area; a Philippine endemic need not be confined to one island. The account above summarises published regional and local research. It does not add occurrences to the snake index below.
Regional framework: Meneses et al. (2024) ↗Zoogeographic sources · 1
- Meneses et al. (2024) · Philippine herpetology, 20 years on ↗Regional framework, Fig. 1; isolation and research gaps. Open-access review, CC0.
Literature checked 7 October 2026. Survey results refer to the dates and areas studied.
Source-backed index
17 species
These are explicit source mentions, not a complete island richness estimate. Fine localities and habitat associations remain separate evidence claims.
Ahaetulla prasina
(BOIE 1827)
Boiga cynodon
(BOIE 1827)
Boiga drapiezii
(BOIE 1827)
Calamaria joloensis
TAYLOR 1922
Calamaria palavanensis
INGER & MARX 1965
Calamaria suluensis
TAYLOR 1922
Calamaria virgulata
BOIE 1827
Calliophis suluensis
(STEINDACHNER 1891)
Chrysopelea paradisi
BOIE 1827
Dendrelaphis flavescens
GAULKE 1994
Dendrelaphis marenae
VOGEL & VAN ROOIJEN 2008
Gonyosoma oxycephalum
(BOIE 1827)
Malayopython reticulatus
(SCHNEIDER 1801)
Oligodon meyerinkii
(STEINDACHNER 1891)
Ramphotyphlops suluensis
(TAYLOR 1918)
Sibynophis geminatus
(BOIE 1826)
Xenopeltis unicolor
REINWARDT 1827
A source naming Sulu does not establish occurrence in every municipality, protected area, or habitat on the island.