Among the preventive measures to avoid the development of the H5N1 virus, figures the breeding birds lit in quarantine during the migration periods. On that context, Geneva's town proposed the construction of two new covered aviaries on the Bois-de-la Bâtie. group8 set up a sinuous path for the visitors, wishing to avoid an only viewpoint, direct and determined of the birds, and developed a free volume hard to apprehend.
The shape of the slabs, sheltering the birds, at 9 m from the floor takes its inspiration from the morphology of the site as well as the trees bordering the pond. An almost invisible stainless steel wire mesh has been stretched to the slab, modifying the usual meaning of an enclosure and the moral aspect of caging for the pleasure of the visitors. The shapes of the sixteen pillars supporting the slab represent the surrounding trees. Theirs colours are also inspired by the place's shades : six in different shades of grey and 6 in different shades of green nuance those "trees" and assure a fusion with the surrounding landscape. Following the footsteps of Gaudi and Frei Otto, the calculation method consisted on the simulation of a reversed model to found the perfect balance by using a minimum amount of material. Each of the sixteen pillars is unique, creating a static balance, really precise and delicate, as the image of a bird holding on a tree branch.