あかとんびじゃなかったです
赤鳶じゃなかったです
akatombijanakattadesu

Noun
Desu Copula

The polite, past negative form of あかとび

1. Wasn't red-brown.; Wasn't reddish-brown.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana