gq: It has been possible to teach a migration route to a flock of birds, for example in re-introduction schemes. After a trial with Canada geese Branta canadensis, microlight aircraft were used in the US to teach safe migration routes to reintroduced whooping cranes Grus americana.
Question: What is a re-introduction scheme? Question: Which birds did they use as a trial run? Question: What did they use to teach birds a migration route? Question: Which birds did they reintroduce to the US?