おがさわらだいこうもりであれば
小笠原大蝙蝠であれば
ogasawaradaikōmorideareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of おがさわらおおこうもり

1. If it were Ogawara’s flying fox; If Ogawara’s flying fox existed

Ba Conditional
Usually Written in Kana