During the breeding season, females migrate down-river and lay eggs on sandy beaches a few kilometres from the mouth of their home river (2). In mangrove swamps, where no beaches occur, the sand banks of the river are used for nest sites (2). Nesting occurs at night at low tide with an average clutch size of 10 to 12 eggs (4) (5).
Painted terrapins are generally herbivorous, feeding on the leaves and fruits of riverside plants (4). Terrapins may crawl onto logs or vegetation mats to bask in the sun (2).