"Philo" the barn owl automaton is created  completely from salvaged and reclaimed metals in the line of early automata makers that often used whatever parts and pieces they had available.  The mechanisms inside are completely created from reclaimed metal cuttings, a salvaged angle grinder gearbox, reclaimed bolts and nuts, and driven by a salvaged car windshield wiper motor.  Each piece was put together in a way to form a machine that operates all the movement, an engineering feat in itself since the pieces were all meant for something totally different when they were made. That's part of what makes these automatons so unique and not replicable.