Hi Burn,
We're at a start of a snow storm right now, lots of bird activities
You've got at least one Arctic Redpoll in there, the one on the left side showing its pure white under-tail coverts; Common Redpoll always has at least one obvious dark streak there, never white like that. The one top left with the white rump might also be Arctic, but not 100% definite.
While male Arctics are usually obvious, females and immatures can be very hard to pick out (e.g. they can have a slim dark streak on the undertail); it's generally reckoned that a lot get missed - to pick them out, you need to look at a suite of several characteristics, and it's never easy trying to see both the top side and underside of a single bird in a constantly active flock. A year like this one with a redpoll invasion is a good opportunity to do a study!
Resin