The grey-headed fish eagle (Ichthyophaga ichthyaetus) inhabits lowland areas near jungles, rivers, lagoons, and reservoirs. They are often seen perched on branches above water, patiently watching for fish near the surface. These eagles are sexually dimorphic, with females being larger than males. Their diet mainly consists of fish, though they occasionally prey on reptiles, birds, and small mammals. In Sri Lanka, their breeding season runs from December to March, during which they build large stick nests in tall trees and lay clutches of 2 to 4 eggs.