Tomo-chan wa Onna no ko! - Vol. 6 Ch. 650 - An Argument

[MangaDex]

 

[Oeconomist]

It's a butterfly.

 

[caitsith]

It's a moth.

 

[BroxTheMeerkat]

NNNRRRGAAARRAAAA

 

[CapnBoozilla]

No Buttermoths were harmed in the making of this chapter.

 

[Konrad2]

Thanks for the translation.

 

[dedotikea]

It's a butterfly.

 

[Chtholy]

It's a moth.

 

[hibugji]

Being used to something makes you like that

 

[chickenwing524]

It's a stepladder

 

[Quickshot76]

No, that looks like a butterfly.

 

[DerpyDodo]

Definitely a moth

 

[Bakabix]

Nah its neither butterfly nor moth. Its a picture.

 

[Siranto1]

It is most definitely a butterfly

 

[MahiyanPrethu]

It's a blue eyes white dragon

 

[demonslender]

it's a butterfly obviously, misuzu is just arguing for the sake of arguing. moths look very different from butterflies in both size and wing shape.

 

[Rock_blocks]

It's a moth masquerading as a butterfly

 

[slackingaround]

You foolish people, its not a butterfly nor a moth, ITS A BIRD!!!

 

[flannan]

In case somebody needs it, https://en.wikipedia.org/wiki/Comparison_of_butterflies_and_moths
Since the insect is observed during the day, it is likely a butterfly. It's hard to see the rest of the differences in a manga page, such as butterflies usually being a lot more colorful.