Marion Vollborn/ BIA / Whooper Swan (Cygnus cygnus) group taking flight on snow, Hokkaido, Japan

Daniel J. Cox / White-tailed Eagle (Haliaeetus albicilla) hunting, Hokkaido, Japan

Markus Varesvuo / Japanese / Red-crowned crane (Grus japonicus) two calling and dancing, part of bonding and courtship display, Hokkaido Japan February

Wim van den Heever / White tailed eagle (Haliaeetus albicilla) caught in a fight. Hokkaido Japan, March.

Wim van den Heever / Japanese cranes (Grus japonensis) in courtship dance, Hokkaido Japan, March.

Wim van den Heever / White tailed sea eagle (Haliaeetus albicilla) group of three fighting, Hokkaido Japan, March.

Wim van den Heever / White tailed sea eagle (Haliaeetus albicilla) flying looking over shoulder, Hokkaido Japan.

Wim van den Heever / Japanese crane (Grus japonensis) jumping in the air, Hokkaido, Japan, March.

Wim van den Heever / Whooper swan (Cygnus cygnus) mid flight over the frozen lake, Kussharo, Hokkaido, Japan.

Wim van den Heever / Whooper swan (Cygnus cygnus) portrait, on frozen lake Kussharo, Hokkaido Japan, February.

Wim van den Heever / Whooper swans (Cygnus cygnus) juvenile with adults behind, on frozen Lake Kussharo, Hokkaido, Japan. February.

Wim van den Heever / White tailed sea eagle (Haliaeetus albicilla) in flight, Hokkaido, Japan, March.