I love captures like these - National Geographic style!
However, my OCD immediately kicks in, wanting to straighten the tree. I love the creamy blue background and the nice greens, and although they set the scene, they don't really add anything to the powerful subject - which is a mom feeding the 2 kids. Could've possibly done better with a closer crop I think. Wonderful capture regardless.
I love how this is an early morning shot, with the bright colors in the background and yellow highlights. You caputred a rare moment, seeing baby woodpeckers feeding from their hidy-hole.
I wish you had a touch more contrast to get a true black on the birds, but other than that this is perfect. I especially like fact that you left that patch of open sky in the lower right.