I mispled "advice" on my previous entry.
Here are instructions about paper model making in Japanese:
ペーパークラフトを楽しもう！！「のりづけ編」｜作り方ガイド｜YumaYumacraft（ユマユマクラ フト）
This is the translated explanation of the two headed bird.
"You can download the popular "Yogen Notori" paper craft for free. "Amabie" has become a hot topic in this corona disaster, but there is a similar mythical lore in Yamanashi Prefecture.
It is a bird "Yogen Notori" that has two heads and resembles a crow.
It was a mysterious existence that appeared as a result of the people of Kai Province, which was suffering from the plague, seeking salvation."
Here are many paper models. I don't remember if this has been posted before, if so please just revisit the site.
Cut Fold Glue
Perhaps there are new paper models here if this is a repost.