Neoascia geniculata (Meigen, 1822)

Identification

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

Biology

The small, semi-aquatic larva has been found in decaying vegetation around the margins of ponds. Usually swept from lush emergent vegetation, such as Reed Sweet Grass Glyceria maxima, around ponds and ditches. Adults visit flowers, especially buttercups Ranunculus sp., but do not seem to move far from larval habitat.

Flight period

The following plots show the number of unique records per week that were not reported to be of eggs, larvae or pupae.

Distribution

Very widely distributed but probably under-recorded owing to the difficulty of identification.

Trends

The following plots show the Frescalo TFactor vs year and a map of the rescaled frequency (all records) for the species. For an explanation see here.