Syrphus torvus

Syrphus torvus Osten-Sacken, 1875

Biology & ecology:

The larva feeds on a wide range of ground layer and arboreal aphids. Adults visit a wide range of flowers and often found around trees, typically along woodland edge and hedgerows, as well as in orchards and mature gardens. Like S. ribesii, it is multiple-brooded and has a long season, but it tends to show marked, and quite brief peaks of abundance in the spring and again in mid-summer.

Distribution:

This hoverfly (especially the female) is probably overlooked amongst other Syrphus species. There has been a tendency to think of it as a southern species, but recent records suggest that it is also common in Scotland.

Status & conservation:

General trends suggest a decline in occurrence. In some years this can be an abundant species, especially during the early spring flight period, but in other years it appears scarce or almost absent.

Recorded from 1104 hectads since 1990.