The heron and nesting material look fantastic! Awesome details, great light, and I like the dynamic pose. The BG seems to have some processing artefacts in front of the neck, and I do wish for a bit more room above (and right to retain the aspect ratio).
This is a nice image. I like the overall colors of it and the GBH is sharp and with great wing position aswell. I do notice a bit of cloning artifacts like Daniel mention below the beck of the bird.