きそくはいくろかもめなら
黄足背黒鴎なら
kisokuhaikurokamomenara

Noun
Da Copula

The "-nara" conditional form ("if/when…") of きあしせぐろかもめ

1. If/when it has yellow feet and a black back, it’s a gull.

Nara Conditional
Usually Written in Kana