すすいろあほうどりであれば
煤色信天翁であれば
susuiroahōdorideareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of すすいろあほうどり

1. If it were a sooty albatross; If [it] were a sooty albatross

Ba Conditional
Usually Written in Kana