The tree house 'bird apartment' by Nendo, located in a forest in Komoro City in Japan's mountainous Nagano Prefecture. The treehouse has entrances to 78 nest spaces for birds on one side, and a viewing space for one person on the other.
Meggie O'Rourke's tree house is a bit like this, surrounded by three maple trees, with squirrels leaping through the branches. From the novel, IF YOU COULD SEE the type of wood. WHAT I SEE by Cathy Lamb