Imprinting is a survival strategy that occurs when a newly hatched bird sees another animal and then forms a strong attachment to it. Usually it’s the baby’s mother, but sometimes it can be an inanimate object, such as a stick, or a different animal, such as a human. The most impressive demonstration of this has to be from Italian hang glider pilot Angelo d’Arrigo. He reared a flock of Siberian cranes under the wing of his hang glider, and then in 2003, guided them all the way from northern Siberia to the Caspian Sea in Iran; a journey of 5,500km.