- Trees: Many birds, such as songbirds, build nests in trees. These nests are typically made of twigs, leaves, and other plant materials.
- Shrubs: Some birds, such as cardinals, build nests in shrubs. These nests are often made of twigs and grasses.
- Ground: Some birds, such as pheasants, build nests on the ground. These nests are typically made of grasses and leaves.
- Cliffs: Some birds, such as eagles, build nests on cliffs. These nests are often made of large sticks and branches.
- Buildings: Some birds, such as pigeons, build nests on buildings. These nests are often made of straws and feathers.
- Other structures: Some birds, such as barn swallows, build nests on other structures, such as bridges and barns. These nests are often made of mud and saliva.
The specific nesting site that a bird chooses depends on a number of factors, including the species of bird, the availability of nesting materials, and the bird's predators.