So it's all pretty much there except for one specific thing: The longer the lens, the better the effect.
Longer lenses have shallower depths of field than shorter lenses. In fact with a wide angle lens, you can have EVERYTHING in focus on a landscape shot from the ground in front of you to the horizon.
By shooting at 200mm, f/2.8, I isolated the birdhouse from the background. This is one of the reasons that fast lenses are desirable. The creamy smoothness of the background is the hallmark of a good lens.
Good job all!
GAD