Why are hoverflies attracted to oak trees in the UK?

Hoverflies-Uk Breed. ... The species Syrphus ribesii may be encountered on trees, shrubs and herbs where they feed on aphids. ... especially where members of the Asteracea {daisy family} are in bloom, and as previously mentioned during September and October when they are attracted to the flowers produced by ivy. read more

Many hoverflies have spots, bands or stripes of yellow or brown against a dark-coloured background, sometimes with dense hair covering the body surface (emulating furry bumblebees). Their fast flight, ability to hover and, in some species, their size are astonishing characteristics. Some hoverflies are among the largest flies of Central Europe. read more