Critically endangered
4 species| Photo | English | සිංහල | தமிழ் | Scientific name | IUCN | Sri Lanka |
|---|---|---|---|---|---|---|
| Dayawansa’s Shrub Frog | දයාවංශගේ පඳුරු ගෙම්බා | — | Pseudophilautus dayawansai | CR | Endemic | |
| De Silva’s Rough-Sided Snake | ද සිල්වාගේ මැඩිල්ලා | — | Aspidura desilvai | CR | Endemic | |
| Deignan Tree Skink | ඩේග්නන්ගේ ගස් හික්කනලා | டீக்னனின் மர அரணை | Lankascincus deignani | CR | Endemic | |
| Dumbara Corrugated Frog | දුම්බර රැළි ගෙම්බා | தும்பறை மடிப்புத் தவளை | Lankanectes pera | CR | Endemic |
