They're everywhere in your garden, perfectly disguised as bees. But these master con artists are actually flies - and they might be your garden's best-kept secret! Discover the pollinators hiding in plain sight and why their 'fake bee' act is actually saving your plants.

www.secretpollinators.com

KEY SOURCES

Hoverfly pollination

• Doyle, T., Hawkes, W. L. S., Massy, R., Powney, G. D., Menz, M. H. M., & Wotton, K. R. (2020). Pollination by hoverflies in the Anthropocene. Proceedings of the Royal Society B, 287(1927). DOI: 10.1098/rspb.2020.0508
• Rader, R., Cunningham, S. A., Howlett, B. G., & Inouye, D. W. (2020). Non-Bee Insects as Visitors and Pollinators of Crops: Biology, Ecology, and Management. Annual Review of Entomology, 65, 391–407. DOI: 10.1146/annurev-ento-011019-025055
• Rader, R., Bartomeus, I., Garibaldi, L. A., et al. (2016). Non-bee insects are important contributors to global crop pollination. PNAS, 113(1), 146–151. DOI: 10.1073/pnas.1517092112

Dual role: pollination and pest control

• Wotton, K. R., Gao, B., Menz, M. H. M., et al. (2019). Mass seasonal migrations of hoverflies provide extensive pollination and crop protection services. Current Biology, 29(13), 2167–2173. DOI: 10.1016/j.cub.2019.05.036

Larval aphid predation

• Rojo, S., Gilbert, F., Marcos-García, M. A., Nieto, J. M., & Mier, M. P. (2003). A World Review of Predatory Hoverflies and Their Prey. CIBIO Ediciones, Alicante.
• Wnuk, A., & Fuchs, R. (1977). Prey consumption in Scaeva pyrastri — up to 550 aphids per larva.
• Bankowska, R., et al. (1978). Prey consumption in Platycheirus clypeatus — approximately 135 aphids per larva.
• Tenhumberg, B., & Poehling, H.-M. (1995). Syrphids as natural enemies of cereal aphids in Germany: aspects of their biology and efficacy in different years and regions. Agriculture, Ecosystems & Environment, 52(1), 39–43.
• Encyclop'Aphid, INRAE. Diptera: Syrphidae. eng-encyclopedie-pucerons.hub.inrae.fr — roughly 250 aphidophagous species within Syrphinae and Melisiinae; larval guilds include phytophagous, microphagous, and zoophagous types.

Mimicry

• Golding, Y. C., & Edmunds, M. (2000). Behavioural mimicry of honeybees by hoverflies. Proceedings of the Royal Society B, 267(1446), 903–909.

Hovering flight

• Ellington, C. P. (1984). The aerodynamics of hovering insect flight. Philosophical Transactions of the Royal Society B, 305(1122).
• Dudley, R. (2000). The Biomechanics of Insect Flight. Princeton University Press.

Identification

• Skevington, J. H., Locke, M. M., Young, A. D., Moran, K., Crins, W. J., & Marshall, S. A. (2019). Field Guide to the Flower Flies of Northeastern North America. Princeton University Press.

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