Birding with the Canon 7D and Sigma 150-500mm F5-6.3 APO DG OS HSM

Today I went out birding at the nearby lake with my Canon 7D and Sigma 150-500mm F5-6.3 APO DG OS HSM. It's not a light combination, the lens alone is 1780g and together with the body it's around 2.6KG! I do not carry a bag or any accessories along, so it's basically just the camera and lens attached to my Black Rapid strap. 😁

The AF-tracking was responsive and it's not hard to lock-in focus in such bright daylight, although not all photos taken are keepers (which is normal). 😉

Setting is basically the widest aperture, auto ISO with shutter speeds of 1/600 if the bird is stationary or 1/2000-1/4000 if it's moving.

Here are some of the photos taken:

Oops... How did this photo get here? 😄

What do you think?