Some herons are found nesting on top of mangrove trees along a river in Pasir Ris Park, Singapore. There are also mangroves growing by the beach, with their aerial roots visibly protruding from the sand. Some are pencil-like roots, while others are stilt roots (or prop roots). The aerial roots enable the plants to breathe since there is not much oxygen in the sand due to the saline condition of the coast, I think. Some mynahs are spotted foraging among the seaweed along the beach.