I'd like to echo the praise for Peter's wonderful swallow image.
A few years ago I visited a Kite feeding station in Wales and was stood next to the hides with my 300mm & TC. As the kites came and went I noticed a regular blur out of the corner of my eye. When I finally checked this, it was a pair of Swallows flying into the hide right next to where I was standing, feeding their nestlings who were in the eaves of the hide! (note for members from the USA, I believe you call a hide a "blind").
This became more interesting than the kites, but taking a shot was a challenge with the 300mm (plus low light and a D300).
The EXIF says this is Nikon D300, 1/30s f/4.0 at 300.0mm iso800 (just a monopod I think)
