まだらフルマかもめだったら
斑フルマ鴎だったら
madarafurumakamo medattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of まだらフルマかもめ

1. If/when it were a common gull:; If/when it's a common gull:

Tara Conditional
Usually Written in Kana