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Parasyrphus annulatus (Zetterstedt, 1838)

Identification

Identification difficulty = 3. microscope_icon camera_icon_cross according to Ball & Morris, 20241

Synonymy

Syrphus annulatus Zetterstedt in Coe(1953)2.

Biology

Larva not described, but larvae of this genus are usually arboreal predators on adelgids and pine aphids. Normally found in larger woods, usually with some coniferisation. Adults are generally found visiting flowers, or settled on sun-lit vegetation and are fairly distinctive, being noticeably smaller than other black and yellow syrphines.

Flight period

The following plots show the number of unique records per week excluding those reported to be of immature stages. Phenology plots for Parasyrphus annulatus

Distribution

Very local (but sometimes abundant where it occurs) in woods in southern and central England, with scattered records throughout most of mainland Britain, north to south-east Sutherland. Distribution map for Parasyrphus annulatus

Trends

The following plots show the Frescalo TFactor vs year and a map of the rescaled frequency (all records) for the species.Trend plots for Parasyrphus annulatus

  1. Ball, S., & Morris, R. (2024). Hoverflies of Britain and Ireland. WILDGuides (3rd ed.). Oxford: Princeton University Press. ↩

  2. Coe, R. (1953). Diptera: Syrphidae. Handbooks for the Identification of British Insects, 10(1), 1–98. ↩