The Quiz: Many moths have antennae shaped like what?
A Spirals
B Crescents
C Feathers
Featherlike or saw-edged antennae are telltale signs you’re looking at a moth and not a butterfly. Virtually all butterflies have club- or ball-shaped growths at the tips of their antennae, so if you don’t see those on the bug you’re studying, it’s almost certainly a moth.
The correct answer to this quiz is Feathers.