Lake Kussharo, an inland lake in the west of Hokkaido, is a caldera lake, a remnant of a long-ago erupted volcano. Its violent, seismic past is evident even today, with natural hot springs bubbling up along its shoreline, heating both the water and gravelly shores. It is here where the Whooper Swans gather to find refuge from Hokkaido’s brutally cold winters.

The red-crowned crane (Grus japonensis), also called the Manchurian crane or Japanese crane (Japanese: 丹頂鶴 or タンチョウヅル; rōmaji: tanchōzuru), is a large East Asian crane among the rarest cranes in the world. In some parts of its range, it is known as a symbol of luck, longevity, and fidelity.