Audubon Center at Mill Grove in Pennsylvania:
The Center will also commemorate the 100th anniversary of the extinction of the Passenger Pigeon:a bird once so common that John James Audubon observed a flock that eclipsed the sun for three days. Their numbers were once in the 3-5 billion range and were killed at such numbers; they went extinct in record time. In honor of the anniversary, the Center will feature new exhibits, sculptures, and an exciting art installation created by local artist, Mallary Johnson. This magnificent hanging installation, Eclipse, includes over 1,500 origami Passenger Pigeons, folded by more than 20 schools from eight districts as well as numerous members of the community.
Hat tip: Judith Fryer on the Origami-L.