さんしかもめでしょう
三趾鴎でしょう
sanshikamomedeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of みつゆびかもめ

1. Probably a black-legged kittiwake.

Polite
Presumptive
Conjecture
Usually Written in Kana