In Japan, the long-tailed tit is a kind of cute little
bird, and four subspecies have been confirmed.
The subspecies a. c. japonicus that lives in Hokkaido
has almost white plumage.
On the other hand, in the northwestern part of Chiba
Prefecture, where I live, individuals similar to the subspecies that have
inhabited Hokkaido since the Edo period have been confirmed.
Its name is called Chiba Enaga.
This is a colloquial name, not a scientific name.
I can't find an academic report about this long-tailed
tit that has a white color inhabiting my residence.
Speaking of which, I wonder if there are wild bird
researchers in this country, I have no idea
Remarks:
Chiba is one of the prefectures in Japan close to Tokyo,
and Enaga is the Japanese name for the bird.
The Edo period (江戸時代, Edo
jidai) or Tokugawa period (徳川時代, Tokugawa jidai) is the period between 1603 and
1867 in the history of Japan
This is exactly
what I have believed for a long time to be the subspecies "a. c.
japonicus".👇
Aegithalos caudatus trivirgatus⇩
A website of a subspecies "a. c. japonicus" ⇩
https://www.qkamura.or.jp/cms/cash/815_20221215130134.jpg