Ensign Wasp
Scientific Name: Evania appendigaster
Order & Family: Order: Hymenoptera; Family: Evaniidae
Size: 5 to 7 millimeters in body length
Natural Habitat
Commonly found in urban environments, homes, and structures where cockroaches are present.
Diet & Feeding
Adults feed on plant nectar, but larvae are parasitic and feed exclusively on cockroach egg cases (oothecae).
Behavior Patterns
They are easily identified by a distinctive bobbing of their tiny, flag-like abdomen as they walk. They are solitary and do not form colonies.
Risks & Benefits
They are highly beneficial as they provide natural pest control for cockroaches. They do not sting humans or pets and are harmless to property.
Identified on: 6/16/2026