Osprey sometimes known as the sea hawk, fish eagle or fish hawk, is a diurnal, fish-eating bird of prey. Single nests or colonies are built in tall trees, on the ground on small islands, or on ledges of cliffs. The nest is a bulky structure. The nests may be used by many generations of birds, becoming huge in the process. Two to four white eggs marked boldly with dark brown blotches are laid. Downy young hatch in about five weeks and are fed by both parents. The young birds fledge in six to eight weeks.