Editing Bird migration (section)

===Migration conditioning===

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 goose|Canada geese]] ''Branta canadensis'', [[microlight]] aircraft were used in the US to teach safe migration routes to reintroduced [[whooping crane]]s ''Grus americana''.<ref>{{cite web |url=http://www.operationmigration.org/index.html |title=Operation migration|date=7 September 2021 }}</ref><ref>{{cite web |url=http://dnr.wi.gov/files/pdf/pubs/er/er0650.pdf |title=Wisconsin Whooping Crane Management Plan |publisher=Wisconsin Department of Natural Resources |date=6 December 2006}}</ref>