This pair of young Mute swans very obligingly flew in circles around a lake for me, so I could prepare to photograph them each time they came round. Perhaps they were practising their flying skills. Unfortunately I only had a compact camera so it was quite a challenge to shoot the rapidly moving target, even though they were quite predictable.

A Mute swan weighs 8-10Kg and has a wing span of 2.25m, so they're the heavy bombers of the bird world.