What is That.

Another hard day at the office, not many workplaces like this... Back in the countryside I started in some years ago, I must say it has`nt changed very much and that`s just how I like it.. Chased small coppers about about for some time, and I don`t mean litttle Policemen, but with no great success, will try again sometime, also tried to take a Curlew in flight, total failure, getting the focus correct is the problem, think I`ll have to go manual next time... By the way what is that thing creaping into my shot ????