The other day while we were doing a bee inspection, I kept an eye on Mr. Neil's finch feeder--they were chock full of common redpolls and pine siskins. You can see some of the tracking of pine siskins at Audubon's Great Backyard Bird Count website...interesting that they are calling it a winter finch invasion. I recall a few year ago when the thousands of great gray owls were in Minnesota, a couple of ornithologists' took me to to task for using the term "invasion" instead of "irruption" (apparently the proper term for ornithologists). I did some digiscoping and digivideoing while at Mr. Neils and even set up a couple of different motion sensitive cameras. Check out some of the finch hissy fits I got with the Wingscapes camera:

Redpolls fighting!

More fighting!

And yet more fighting!

And even picking on a poor little junco! Here's a digivideo of some of the sqaubbling on our 36" long finch feeder: