The world's 26 remaining wild whooping cranes have begun to leave Wood Buffalo National Park in Canada on their annual migration south to Texas. Eight adults and two young have been sighted. Gunners along the whooper fly-way, which extends through Alberta. Saskatchewan, the Dakotas, Nebraska, Kansas, Oklahoma and Texas, are urged not to shoot at any large white bird. Whooping cranes have more than seven-foot wingspread, long neck, red crown on head, and wing tips are black. Young are buff, mottled with white.