Swans resting in sand, Hokkaido Prefecture, Japan

Swans resting in sand, Hokkaido Prefecture, Japan

Steller's Sea Eagles resting on iceberg, Hokkaido Prefecture, Japan

Steller's Sea Eagles resting on iceberg, Hokkaido Prefecture, Japan

Steller's Sea Eagles resting on iceberg, Hokkaido Prefecture, Japan

Steller's Sea Eagles resting on iceberg, Hokkaido Prefecture, Japan

Swans at Lake Utonai

White Whooper swan preparing for take off with outstretched wings over snowy frozen lake, detail monochrome, Lake Kussharo, Hokkaido, Japan

Two Whooper swans in flight over snowy frozen lake, monochrome close up, Lake Kussharo, Hokkaido, Japan

Whooper swan displaying with wings outstretched, while walking on frozen Lake Kussharo, monochrome image, Hokkaido, Japan

Single Whooper swan in flight over snowy frozen lake, close up, motion blur effect showing double wing position, Lake Kussharo, Hokkaido, Japan

Four Whooper swans flying over frozen lake in early morning mist with trees in background, frontal view, Lake Kussharo, Hokkaido, Japan

Single Whooper swan in flight over snowy frozen lake and open water channel, monochrome close up, with wing motion, Lake Kussharo, Hokkaido, Japan

Two Whooper swans flighting over bread while running along frozen Lake Kussharo, close view, Lake Kussharo, Hokkaido, Japan

Whooper swan displaying with wings outstretched, and other swans nearby on channel of water in frozen Lake Kussharo, Hokkaido, Japan

Whooper swan displaying with wings outstretched, and other swans nearby on channel of water in frozen Lake Kussharo, Hokkaido, Japan

View over frozen Lake Kussharo with volcanic island of Nakajima in centre, snow covered foreground landscape and pink dawn sky, Bihoro Pass, Hokkaido, Japan

Flock of Whooper swans flying into water channel beside frozen lake in late afternoon golden sunlight with steam rising, Lake Kussharo, Hokkaido, Japan

Lake Kussharo in winter, Hokkaido prefecture, Japan

Swan flying over frozen lake, Hokkaido Prefecture, Japan