I have been doing a lot of backyard bird photography lately and this little guy is just another one of my subjects. A Sitta Canadensis is also known as a Red-breasted Nuthatch. These little guys are funny. They spend most of the time feeding upside down. They will actually hoard food by wedging it in the cracks of trees and the tree bark, then will hammer the food in with their beak, saving it for later.
They have short tails and an enlarged hind toe to help them climb up and down trees.
I took this image at my home in Michigan with a 70-200 and a 1.4 extender attached. I have a remote flash set up to help capture the detail of the bird. I was shooting at f16 with a shutter speed of 1/320. The flash was set up on ETTL. As you can see it was also snowing which makes for a more interesting image.