A nesting box is typically a small structure that is used by animals like birds, squirrels, and rabbits for shelter, protection, and breeding. It can be handy for those who like to keep pets and want to provide them with an enclosed area to lay eggs. There is a range of alternative terms that you can use to describe a nesting box. Some of the most common synonyms for this type of structure include birdhouse, rabbit hutch, squirrel den, nest, and coop. Each term has its own unique attributes which reflect the specific animal species, size of the box, and materials used in constructing it.