A structure prepared by many animals for the protection of
their eggs and young, or for sleeping purposes. In social insects, the nest
provides the home of the whole colony, and may have special structures for
temperature control and ventilation. The sleeping nests of, for example,
the great apes, are commonly no more than crudely woven hammocks of twigs
and branches. The sleeping nests of other mammals (which may be used for
hibernation) are as complex and woven
as any breeding nests. Both these and the nests used by birds and mammals
for breeding, must protect the animals within from both weather and predators.
Nests can be built of mud, leaves, twigs, down, paper, and various kinds
of human garbage.