The dancing tanchōzuru:

With wings slightly raised and heads held high, a pair of red-crowned cranes begin to march, their broad, three-toed feet puncturing the snow as they trumpet loudly and steam rises from their beaks. The male calls first, followed closely by the female—several notes in quick succession, strengthening their bond. But this vocal parade is just the prelude. Now the pair begin to dance, bowing heads, flapping wings, leaping up and down and spinning around, sometimes picking up sticks and leaves and tossing them in the air. Their momentum triggers other couples to do the same, then the juveniles join in, until the whole flock is in motion—mesmerising flashes of red, black and white, flickering across the snowfields. It’s a sight worth going a long way to see.