I got a few nice bird portraits yesterday. Here's a tree sparrow (Passer montanus) sitting on the edge of a roof.
(5D3 + 500L II + 2x III; 1000mm, f/10, 1/500, ISO 1600).
Current equipment: 5Ds, 5D mark III, 50D, 300D; 24-105L, MP-E, 100L macro, Sigma 180 macro, 500L IS II; 1.4xIII + 2x III extenders; 600EX-RT.
Former equipment includes: EOS-M, EF-M 18-55, Samyang 14mm f/2.8, EF 35 f/2 IS, 70-200L f/4 non-IS, 85L II, 200L 2.8, 400L 5.6