moth
蛾 centers on a moth, a winged insect related to butterflies but typically nocturnal and less colorful.
蛾 combines 虫 (insect) with 我, which likely contributes the sound. The character specifically denotes a moth.
The insect radical 虫 on the left tells you it's a bug, and the right side 我 looks like a moth with its wings spread. Together, 蛾 is a moth.
For ギ, imagine a moth flying toward a bright key: key -> ギ, and the moth is drawn to the light.
moth
Tinea translucens (species of clothes moth)
yellow stem borer (Scirpophaga incertulas)
yellow stem borer (species of moth, Scirpophaga incertulas)
striped stem borer (Chilo suppressalis)
Monema flavescens (species of slug moth)
cabbage armyworm
owlet moth (members of the family Noctuidae); noctuid
coffee bee hawkmoth (Cephonodes hylas); pellucid hawk moth; coffee clearwing
lobster moth (Stauropus fagi persimilis)
diamondback moth (Plutella xylostella); cabbage moth
common clothes moth (Tineola biselliella)
geometer moth; geometrid
Japanese oak silkmoth (Antheraea yamamai)
Indian owlet-moth (Spirama retorta)
tineid (any moth of family Tineidae)
Yakudza vicarius (species of moth)
Calliteara argentata (species of moth)
poisonous moth
garden tiger moth (Arctia caja)