King rail
This rail forages in shallow water near cover and eats mainly aquatic insects and crustaceans. It forages by probing the mud while moving around in shallow water.
Stingray
Most stingrays feed primarily on mollusks, crustaceans, and occasionally on small fish. Freshwater stingrays in the amazon feed on insects and break down their tough exoskeletons with mammal-like chewing motions. Large pelagic rays like the Manta use ram feeding to consume vast quantities of plankton and have been seen swimming in acrobatic patterns through plankton patches.