Easily mistaken for a bee, Eristalis is in fact a clever mimic capable of luring many an unsuspecting observer into the land of amusing taxonomy fail.
But the structure of the antennae, the broad attachment of the abdomen to the thorax, and the presence of only a single pair of wings mark it as a fly.
I took this photo in bright sunlight, although it doesn’t look that way from the black backdrop. This dramatic lighting effect is achieved by using such a small aperture (f/13) and a fast shutter speed (1/250 sec) that almost no ambient light reaches the sensor. A small but intense flash directed at just the fly and the flower- but not the garden in the background- provides sufficient illumination for a proper exposure of just the intended subject.
photo details: Canon EOS 7D camera
Canon MP-E 65mm 1-5x macro lens
ISO 100, f/13, 1/250 sec