A Hoverfly on an Iris leaf in our small pond

This is Helophilus pendulus - a hoverfly. It is one of the 4 most common hoverflies in the UK and is associated with a wide variety of waterbodies, from large lakes and rivers down to areas as small as ditches, small ponds or even muddy puddles.

I like the way it appears to be hanging onto the leaf for dear life, and I thought its shadow was quite impressive.