Depending on the animal, these boxes may be used for roosting, breeding, or both, or, as in the case with butterflies, hibernation. Wasps, bumble-bees, or other insects may build their nests inside a nest box intended for other animals, and may exclude the intended species. See also Biological pest control: birds can help controlling pests in agriculture; section also details the planting of food crops for birds Artificial bird nests References External links Shelters built or used by animals Bird conservation Ornithology Birdwatching Birds and humans Bird feeding Buildings and structures used to confine animals Garden ornaments Habitat management equipment and methods Woodworking