I started feeding the birds a week or two ago and it has been interesting. First of all as my son with a bio degree told me most of our winter birds look very similar. Juncos, sparrows, possibly a wren or two and Chickadees etc look very similar from a distance. Nature appears to have selected a physical prototype for small northern birds who have to make it through the winter.
In addition to that a couple of Blue Jays have showed up to rule the roost. It was -10 the other day and you should see how big one of those Jays was puffed up.
Nothing really interesting though. the Jays pretty much drive the Squirrels off.