からふとらいちょうであれば
樺太雷鳥であれば
kara futo raichōdeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of からふとらいちょう

1. If it were Sakhalin ptarmigan; If Sakhalin ptarmigan existed

Ba Conditional
Usually Written in Kana