Material: Wood. A small round hole on one side provides fresh air,provide a safe place for natural breeding and nesting behaviors in birds. Made of a durable and natural wood,a widened base,provide home for all kinds of birds,especially designed to attract all kinds of birds. There is a small door that can be switched on behind the bird's nest,easy cleaning and removal,create a comfortable and clean breeding place for parrots. This can be easily hung from a solid branch point and reused.You can hang in aviary cage or put it directly in the garden.