Eveline Visser has designed Bird City, a city for a mixed bird community. 33 Nesting boxes, catering for the housing needs of 33 different species of birds, to form a breeding ground for the winged inhabitants of the city. The design requires quite a delicate touch: the blue tit wants an opening with a 28 millimetre diameter; the great tit wants 32 millimetres, and the tawny owl will not enter below 80. While one type of bird wants a squat and wide little house, another may prefer a tall and narrow one. Vogelstad offers something for everyone. But will the birds be pigeonholed? Mount the rack on your wall and see which squatters you will accommodate.