Sawflies are not in fact flies, but closely related to bees, ants and wasps. They are the most primitive members of the insect order Hymenoptera. Their name is a reference to the egg-laying tool of the female which is used to cut slits in plants and leaves in which to lay eggs. Sawflies do not sting. As a group, sawflies are very often overlooked in favour of their more familiar relatives.
Adult sawflies resemble flying ants, but without the 'waist' and with a fly-like head. Many are a dull brown or black in colour, but some are bright green or have a black and yellow pattern like wasps. They range in size from 1-3 centimetres. Orkney's largest species, the birch sawfly, Cimbex femoratus, is about the size of a bumblebee.
There are around 500 species of sawfly in Britain, and at least 40 are found in Orkney. They are commonly seen on flower heads during warm spring and summer days. Many can be found in tall grassland or scrub. Around Scapa Flow look for them on umbellifers and heather in sheltered areas, along the edges of streams, or in roadside verges.
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