We get seagulls in the garden a lot, stamping to drum up worms. Sneaky little devils, but you can't argue with its efficacy.
I watched this one for a while and loved the stupid faces he was pulling as I was taking pictures.
Used the 2x teleconverter on the 70-200 for these. You definitely have to be quick with it otherwise the results are really soft, but a nice fast shutter and a smaller aperture and it's sharp enough.