Voltinism-variation
Guides
Cosmopterix montisella
Cosmopterix montisella is a small moth in the family Cosmopterigidae, characterized by distinctive metallic bronze-brown forewings with complex white streaks and orange-brown transverse fasciae. Adults have forewings 5.1–6.5 mm in length. The species exhibits geographic variation in voltinism: univoltine across most of its range with adults active June through September, but bivoltine in southern Arizona with additional late September emergence.