From an ultralight aircraft, Joe Duff leads a flock of migrating whooping cranes through Suwannee County, Florida, Tuesday, Nov. 27, 2001. The U.S.-Canadian Whooping Crane Recovery Team is teaching the endangered species to migrate to Florida. They left Wisconsin October 17 and are expected to arrive at the Chassahowitzka National Wildlife Refuge near Crystal River, Fla., this weekend. (AP Photo/Tallahassee Democrat, Allison Long)