How red-crowned cranes and Steller's sea eagles survive winter

Every year, Teisaku Yamasaki feeds the crowned cranes that winter here in northern Japan. It’s a family tradition that started during very harsh weather back in 1952. It helped the cranes survive. But it attracts other hungry birds too.

Steller’s sea eagles have arrived here from their northern breeding grounds. Like the cranes, they hunt for fish in shallow water, but in cold conditions food is scarce. Such easy pickings are worth fighting for. Even with a huge wingspan of over two meters, Steller’s sea eagles can skilfully maneuver and dodge the sharp beaks of the cranes defending their food.

The fish feast is over in minutes, but it has fed two impressive diners - one of the rarest cranes and one of the largest birds of prey in the world.