Bird-apartment by Nendo
Japanese designers Nendo have built an enormous woodland nesting box with 78 entrances for birds on one side and one big door for humans on the other (+ slideshow).
![Bird-apartment by Nendo Bird-apartment by Nendo](https://static.dezeen.com/uploads/2012/09/dezeen_Bird-apartment-by-Nendo_1a.jpg)
The treehouse was built for observing birds at the Momofuku Ando nature centre in Komoro, in Japan's Nagano Prefecture.
![Bird-apartment by Nendo](https://static.dezeen.com/uploads/2012/09/dezeen_Bird-apartment-by-Nendo_2.jpg)
People can reach the Bird-apartment by climbing up a ladder and through a circular hole.
![Bird-apartment by Nendo Bird-apartment by Nendo](https://static.dezeen.com/uploads/2012/09/dezeen_Bird-apartment-by-Nendo_6.jpg)
Spy holes across the back wall of the apartment allow a discreet view into the 78 bird boxes on the other side.
![Bird-apartment by Nendo Bird-apartment by Nendo](https://static.dezeen.com/uploads/2012/09/dezeen_Bird-apartment-by-Nendo_7.jpg)
We've featured lots of treehouses on Dezeen, including a giant weaver bird's nest in Dartmoor, UK, and a tree-top hotel in northern Sweden.
![Bird-apartment by Nendo Bird-apartment by Nendo](https://static.dezeen.com/uploads/2012/09/dezeen_Bird-apartment-by-Nendo_8.jpg)
Other designs by Nendo we've featured include a tote bag with a pop-out hand puppet and a set of unstable furniture that has to be balanced by books and cups.
![Bird-apartment by Nendo Bird-apartment by Nendo](https://static.dezeen.com/uploads/2012/09/dezeen_Bird-apartment-by-Nendo_3.jpg)
See all our stories about Nendo »
![Bird-apartment by Nendo Bird-apartment by Nendo](https://static.dezeen.com/uploads/2012/09/dezeen_Bird-apartment-by-Nendo_4.jpg)
See all our stories about treehouses »
![Bird-apartment by Nendo Bird-apartment by Nendo](https://static.dezeen.com/uploads/2012/09/dezeen_Bird-apartment-by-Nendo_5.jpg)