japanese cranes - romantic symmetry

arrangement avian balance balanced beak beaks behavior bill bills bird birds black coetaneous coinciding concurrent conformity couple courting courtship crane cranes crowned dance display ecotourism endangered equilibrium equipoise eveness grus harmony head heads hokkaido immortality japan japanese japonensis longevity love lovers nature neck nobility pair paramour protected rhythm romance romantic similarity simultaneous snow suit suitor symmetrical symmetry sync synchronal synchronic synchronous threatened travel twosome white wild wildlife