Diurnal-male
Guides
Orgyia
tussock moths, vapourer moths
Orgyia is a genus of tussock moths in the family Erebidae, characterized by pronounced sexual dimorphism: males are fully winged and diurnal, while females are wingless with reduced, scale-like wings and remain flightless. The genus was established by Ochsenheimer in 1810 and contains cosmopolitan species distributed across most global regions except the Neotropics. Several species are significant forest and agricultural pests, notably Orgyia pseudotsugata (Douglas-fir Tussock Moth), which undergoes periodic outbreaks in western North America.