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Ducks sleep in covered areas, such as marshes and woods, on land or water. This not only provides them with a place to roost, but it protects them from predators.
Water birds will sleep sitting or. standing in the water or on predator-free islands. Many. other birds, such as horned larks, quail and sparrows, sleep on the ground in dense vegetation. Birds which. nest in cavities tend to sleep in their trees, chimneys, or. in nest boxes far away from many predators. It is no ac-. cident that the majority of bird species, including those. that are not regular tree-dwellers, prefer to sleep in trees. or dense shrubs. There they are out of reach of preda-.