Via @designboom, a bird house “bird city”, an entire city for a mixed bird community of up to 33 unique species.

“Observing the high number and diversity of birds in urban spaces, visser designed a structure that can be hung along the sides of buildings or unused walls: spaces that are common in cities but which can be put to more productive use.” More at Eveline Visser. Reminds us of the Jellio TURBO.