がちょうでわありませんでした
鵞鳥ではありませんでした
gachōdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of がちょう

1. Was not a magpie.; Was not a bird of the genus *Cyanopica*.

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana