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Orthonevra intermedia Lundbeck, 1916

Identification

Identification difficulty = 4. microscope_icon camera_icon_cross according to Ball & Morris, 20241

Biology

This is regarded as a species of peat bogs, similar to O. geniculata where it is found in association with water margins such as lake edges and slow moving streams. The larva is unknown. Like related species, adults visit a range of flowers.

Flight period

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

Distribution

Added to the British List by Drake (2006)2 from Delamere Forest, Cheshire: Three males and a female swept on 02/07/2003 from recently cleared secondary birch woodland at Norley Moss, next to the lake at Hatchet Mere. Another two males on 06/07/2003 at Barnsbridge Basin - a small but intact bog. Distribution map for Orthonevra intermedia

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

  2. Drake, C. (2006). Orthonevra intermedia Lundbeck, 1916 (Diptera, Syrphidae) new to Britain. Dipterists Digest (Second Series), 13, 87–91. ↩