Island atlas · Landscapes & species
Dinagat
10 species records name Dinagat. Explore their natural history, taxonomic history and distribution sources.
A landscape view of Dinagat Island.
Photo: Mestiso · Original photograph · CC BY 3.0. Displayed to fit the frame.
Beyond the species list
A sense of place.
Dinagat is the main island of the Dinagat Islands province, south of Leyte Gulf. Mainland Mindanao lies to its south; Leyte is across Surigao Strait to the west. The island extends roughly north to south.
Landscape & habitats
The photograph offers a view of Dinagat’s coastal landscape. Its position between larger islands and open channels is central to understanding the area: mainland Dinagat and the smaller islands around it are related geographically, but are not interchangeable localities.
Dinagat here refers to the named main island, not automatically every island in the province.
Geographic sources
Geographic overview checked 7 October 2026. The photograph illustrates a landscape, not a snake observation.
Islands, barriers & evolution
Zoogeography
Greater Mindanao’s northeastern island bank
Dinagat is one of the islands included in the reconstructed Greater Mindanao landmass. Pleistocene low sea levels offered terrestrial connections with neighbouring islands that are now separated by water.
The 2016 northeast Mindanao study treats adjacent islands individually within that wider context. This is essential for Dinagat: regional affinities can explain similarities, while local habitats, isolation and uneven sampling still produce differences in documented assemblages.
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 · 2
- Sanguila et al. (2016) · Northeast Mindanao and adjacent islands ↗Greater Mindanao connections, regional differences, and records from Dinagat and Siargao.
- 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
10 species
These are explicit source mentions, not a complete island richness estimate. Fine localities and habitat associations remain separate evidence claims.
Boiga cynodon
(BOIE 1827)
Calliophis salitan
BROWN, SMART, LEVITON & SMITH 2018
Cerberus schneiderii
(SCHLEGEL 1837)
Chrysopelea paradisi
BOIE 1827
Gonyosoma oxycephalum
(BOIE 1827)
Naja samarensis
PETERS 1861
Oxyrhabdium modestum
(DUMÉRIL 1853)
Psammodynastes pulverulentus
(BOIE 1827)
Stegonotus muelleri
DUMÉRIL, BIBRON & DUMÉRIL 1854
Tropidolaemus subannulatus
(GRAY 1842)
A source naming Dinagat does not establish occurrence in every municipality, protected area, or habitat on the island.