There are about 20,000 individuals living there. Some birds leave the swamp to find food. Every morning during sunrise we see thousands of birds flying off to their feeding areas. Usually they are going to feed in the rice fields and the shrimp farms nearby, where food is easily available. In the afternoon, these birds begin to return to their wetland sanctuary, full of food and ready to rest for the night, where they can perch in mangrove forests and rest up for the next day.
Many birds use the swamp only to roost at night.
Many birds use the swamp to roost as well as feed. And many birds use the swamp to roost, feed, and to raise their families. They build their nests close together and form a breeding colony. Colonial birds in the Biramas swamp include herons, ibises and egrets. Although these birds are typically large, colorful, and noisy, they are safe from predators when they are in their colony.