japanese or red-crowned crane courtship dance

avian balance balanced beak beaks behavior bill bills bird birds black bleak chilly coetaneous coinciding cold concurrent conformity couple courting courtship crane cranes crowned dance display duo ecotourism endangered equilibrium equipoise eveness feather feathers grus harmony head heads hokkaido immortality japan japanese japonensis longevity love lovers nature nobility pair paramour plumage protected red rhythm romance romantic season seasonal seasons similarity simultaneous snow suit suitor symmetrical symmetry sync synchronal synchronic synchronous threatened trees twosome white wild wildlife wingspan winter wintry woo