Males are larger than females in wing length, weight, and bill-size.

One of the smaller hoverflies the wing length is around 4.5 to 8 mm.

Adults are about 6 mm long and a wing length of approximately 7 mm.

The wing length is 220 - 250 mm.

Its wing length ranges between 375 and 470 mm, with females being larger.

The second wing fold is at about two-thirds of the wing length.

It has a forward wing length of 22-28 mm.

The tern is about 30 cm long with a wing length of 21-23 cm.

A worldwide family of approximately 2,500 species, they are small, some with wing length of 1 mm.

The female and male adults are very much alike, having only small differences such as wing length.