The coconut shell birdhouse is made of material, durable and safe for birds. Natural habitat: The handmade coconut shell design gives your birds a feeling of nature and they will be joyful. < br> Coconut shells can be fixed in bamboo, bird cages, hamster cages and so on. Suitable for hamsters, squirrels, birds, sparrows, parrots, small animals and so on. Nest size for pet in coconut shell: about 13 x 13 x 13cm / 5.12 * 5.12 * 5.12in