The Sri Lanka tree crab, (Perbrinckia scansor), is a species of freshwater crabs of the family Gecarcinucidae that is endemic to Sri Lanka.

Females with youngs can be seen during February and March on the ground, never within tree hollows.

The known predators are Greater coucal, White-throated kingfisher, Sri Lanka grey hornbill and Eurasian otter.

[1] The species is categorized as least concern by IUCN, but the habitats are gradually declining.

The water bodies of central hills are invaded by exotic species of fish and other aquatic flora and usage of many areas for human habitations are known to harm the animal.