An architectonic installation for the third Yokohama Triennial of Contemporary Art 2001 in Yokohama, Japan, curated by Fumio Nanjo. A cone shaped hangar building for 72 balsa birds which carry 5 seeds and messages in test tubes inside them. The birds are sent to the height of 10 kilometres with Vaisala -meteorological balloons. After the balloon bursts the bird will glide long distances according to the turbulences and winds landing around Japan and to the Pacific Ocean. The finder of the bird is asked to take responsibility of planting and taking care of the seeds and to send information to Casagrande & Rintala. The building was made out of concrete ironing steel bars and hemp rope.