Just so not all the pictures with the 400 DO II are boring.....
5DIV 400 DO II, 400 mm, 1/1600, f/4, ISO 250
5DIV 400 DO II, 400 mm, 1/1600, f/4, ISO 250
5DIV 400 DO II, 400 mm, 1/1600, f/4, ISO 500 (highly cropped)
400 DO II plus 1.4 TC @ 560 mm, 1/1250, f/5.6, ISO 2500
400 DO II plus 1.4 TC @ 560 mm, 1/1250, f/5.6, ISO 250