I noticed this fallow deer buck and a magpie sitting next to it staring intently at the deer's penis. I tried to move into a better position, figuring I'd get a funny shot out of it when I noticed the magpie jumping on the deers back. It moved a few steps forward. Right after this shot I spooked the deer.
Strange behaviour, I've never seen this before. Reminds me of those birds that feed of the insects of african buffalo.