Sandhill cranes follow an ultralight piloted by Joe Duff as they leave the Necedah National Wildlife Refuge as part of Operation Migration Tuesday near Necedah, Wis.
Fourteen sandhill cranes will follow the ultralight to Chassahowitzka, Fla., in the longest human-led migration to date. The cranes are part of a test program for next year's human-led migration of endangered whooping cranes.
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