[5] In the UK S. pyrastri is a migrant which arrives in some years in high numbers and in others is almost absent.

[7][8] This large distinctive fly has three pairs of white comma markings (lunules) on the abdomen,[7] these are yellow on Scaeva selenitica.

The male's eyes do touch in the centre of the frons, while in the females they are separated.

The larvae are light green or sometimes pink, with a white dorsal longitudinal stripe.

[10] Adults are common visitors to flowers of Apiaceae (Umbelliferae), but also of rape, honeysuckle and daisies.