Ensign Wasp

Scientific Name: Evania appendigaster

Order & Family: Hymenoptera: Evaniidae

Size: 3 to 7 mm in body length

Ensign Wasp

Natural Habitat

Found globally in urban and suburban areas, particularly near buildings or where cockroaches are present.

Diet & Feeding

Adults feed on nectar and honeydew; larvae are specialized predators that consume the eggs of cockroaches.

Behavior Patterns

Notable for their unique flag-like abdomen which they pump up and down while walking. They are solitary wasps and highly active during the day.

Risks & Benefits

Beneficial to humans as they act as a natural biological control for cockroach populations; they do not sting or bite humans.

Identified on: 6/21/2026