Trust me when I say that “little brown moth” is not a taxonomic rabbit hole you want to go down.
This is Acrolophus heppneri, Heppner’s grass tubeworm moth, about 8mm long and with a whopping four whole sentences in its Wikipedia page. The weird little “cowlick” visible on its right side is apparently characteristic.
Heppner’s grass tubeworm moth (Acrolophus heppneri)