I also started a new backyard photo setup last week. Currently I'm using a sheet of deer hunting camo (academy) for the background and I have a similar feeding station... Getting the background colors and distance for bokeh seems to be key.
I love the perch on a stick Idea! This is almost marketable! Got a patent yet? I'm going to do the same! The ability to move the sticks is awesome...
Your backgrounds almost look a little too perfect and a little on the bright side and may be interfering with the white balance... Not sure.. maybe some mixing of colors or some different light patterns...
I'll post my setup soon...
Great info and some really nice shots!
Here's a camo backdrop shot
Northern Cardinal by
Dan Pancamo, on Flickr