Breeding season for Histrionicus histrionicus

During a walk near the Ishikari River I encountered a small group of Histrionicus histrionicus.
The colorful birds are males. On this day I found three pairs making a total of six birds.
Although this is still in the future in the case of these birds, only the females will care for the young, as the males will leave the group. Later, the females will also leave before their chicks are fully independent.
Like land animals, birds have various ways of raising their young.
Histrionicus histrionicus are classified in the Red Data Book of the International Union for Conservation of Nature as an endangered population.
Photo: Histrionicus histrionicus at Sounkyo May 20