Each birdhouse is hand-crafted into a hexagon from untreated pine. As a stand-alone birdhouse NeighBirds is a perfectly fine birdhouse. The genius of the design comes into play when the love birds decide to start a family.
As the family expands so can the number of residential units until you have an entire NeighBirdhood for birds.
According to the Utoopic website, NeighBirds birdhouses are in production and being well-received, although there is no word on price or where to buy them outside of Spain. But the design is simple enough to replicate that just about DIYer could make one.