Indoor-occurrence
Guides
Sergiolus angustus
Sergiolus angustus is a ground spider in the family Gnaphosidae, native to western North America. Like other members of its genus, it exhibits bold coloration that may represent mimicry of velvet ants (Mutillidae). The species is medium-sized, diurnal, and nomadic, actively hunting rather than building webs to capture prey. It constructs silk retreats for molting, egg guarding, and overwintering.
Toxonevra muliebris
flutter fly
Toxonevra muliebris is a small pallopterid fly native to Europe with introduced populations in western North America. Adults are recognized by their distinctive wing pattern featuring broad brown bands. Males exhibit characteristic wing-fluttering behavior that gives the family its common name. The species is associated with tree bark habitats and has been increasingly observed indoors, particularly in North American residences.