おはぐろかげろうでしょう
御歯黒蜻蛉でしょう
ohagurokagerōdeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of おはぐろとんぼ

1. Probably a dragonfly.

Polite
Presumptive
Conjecture
Usually Written in Kana