Similar to other reports, I've seen significantly more redpolls at my feeders this year, compared to my 3 previous winters in Healy. Over the past 6 or so weeks, I've seen perhaps 15 to 30 redpolls daily; most are COMMON REDPOLLS, and as many as 1/4 have been HOARY REDPOLLS.
They move around quickly and are surprisingly hard to observe. Dan Crowson gave me a tip: common redpolls are overall brownish and hoary redpolls are overall grayish - especially for the males. For females, I find that bill size and the amount of white on the rump are most useful. (Sibley shows 1st year females look very similar, but bill size again seems to be a useful field mark).
I placed some photos (mostly poor light and out of focus, but useful for comparison) in album "ErikH".