Evaniella californica
This record describes Evaniella californica (species). Recorded family: Evaniidae. Recorded order: Hymenoptera.
Identification and Appearance
Classification
- Kingdom
- Animalia
- Phylum
- Arthropoda
- Class
- Insecta
- Order
- Hymenoptera (Ants, Bees, Wasps and Sawflies)
- Superfamily
- Evanioidea
- Family
- Evaniidae (Ensign Wasps)
- Genus
- Evaniella
Imported taxonomy record. Source availability varies; see the source references and editorial policy below.
Habitat and Range
Geographic Range
CA, OR
Diet and Behavior
Diet: They lay their eggs in the egg cases of cockroaches that inhabit harvest ant nests.
Additional species information
Species notes from the sources
Etymology: Evaniella californica Ashmead, Can. Ent, vol. 33, p. 304, 1901.
About Flies: the wider group
Order-level background for Hymenoptera, the group containing Evaniella californica. Species-specific details appear above.
Group overview
Hymenoptera includes over 150,000 described species of ants, bees, wasps, and sawflies. Earth harbors approximately 20 quadrillion (20×10^15) ants, with a combined biomass of ~12 megatons of dry carbon - exceeding the combined biomass of all wild birds and mammals (PNAS, 2022).
Ecological role of the group
About 35% of the world's food crops depend on animal pollinators. The chocolate industry, valued at over $100 billion, depends on pollinating flies and midges. Ants are the dominant soil engineers in most terrestrial ecosystems, turning more soil than earthworms in many habitats.
Economic and practical significance of the group
Pollinators contribute $235-577 billion worth of annual global food production (FAO). In the U.S., bee pollination alone benefits crops valued at $18 billion annually, and honey bees are responsible for $5.4 billion in agricultural productivity. Between April 2023-2024, 55.1% of managed honey bee colonies were lost. The U.S. bee population dropped from 5 million to 2.5 million.
Recorded sources for this group: FAO, USDA, EPA, PNAS (2022), US Fish & Wildlife Service. Imported estimates may describe particular regions or reporting periods.
Photos of Evaniella californica (5)
Photo credits: Contributed by Joyce Gross; Additional contributions by Beatriz Moisset , PaleoJon , bdagley
Frequently Asked Questions About Evaniella californica
How big is Evaniella californica?
Forewing 8.5 mm
Where is Evaniella californica found?
Range: CA, OR
What does Evaniella californica eat?
The diet of the Evaniella californica includes They lay their eggs in the egg cases of cockroaches that inhabit harvest ant nests..