Eristalis arbustorum
Encyclopedia
Eristalis arbustorum is a Europe
Europe
Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...

an species of hoverfly
Hoverfly
Hoverflies, sometimes called flower flies or syrphid flies, make up the insect family Syrphidae. As their common name suggests, they are often seen hovering or nectaring at flowers; the adults of many species feed mainly on nectar and pollen, while the larvae eat a wide range of foods...

. The size of the coloured patches on the abdomen varies with larva
Larva
A larva is a distinct juvenile form many animals undergo before metamorphosis into adults. Animals with indirect development such as insects, amphibians, or cnidarians typically have a larval phase of their life cycle...

l rearing temperature, as does wing length. They are attracted to the flowers of cow parsley
Cow Parsley
Anthriscus sylvestris, known as Cow Parsley, Wild Chervil, Wild Beaked Parsley, Keck, or Queen Anne's lace, is a herbaceous biennial or short-lived perennial plant in the family Apiaceae, genus Anthriscus. It is also sometimes called Mother-die , a name that is also applied to the Common Hawthorn...

, common hogweed
Common Hogweed
Heracleum sphondylium, common names Common Hogweed or Cow parsnip, is a herbaceous perennial or biennial plant of the family Apiaceae. It is an umbelliferous plant, in the same group as fennel, cow parsley, ground elder and giant hogweed...

, creeping thistle and knapweed.
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