That's Right, They're Mtn Bluebirds
Many don’t know they are cavity nesters. They use old woodpecker holes for nests. This particular one is in the Ghost Forest and regrettably pretty high up (hence the use of the 2x). I personally don’t like shooting “up” on cavity nesters, the perspective just bugs me but it was a good illustration of an important aspect of photographing cavity nesters.
In the top photo, notice how you see nothing but wood in the frame? Shooting early in the morning gave the tree trunk shading so you have the idea it’s a “round” tree. Without that shading, if would look like a piece of wood from the hardware store. The bottom photo is the more preferred angle and that because the photo has a visual depth. Seeing any background behind the tree, in this case blue sky, gives a feeling of roundness without the shading and at the same time a sense of place. Background is everything even in this simple scene.
Photo captured by D3x, 600VR w/TC-20e3 on Lexar UDMA digital film