Very sweet. Nice soft textures in the plumage and snow. Maybe a little more room around the bird? Some of the snow is a bit light on detail - maybe a linear burn may help bring back a little.
Nice little downy enjoying some suet it looks like.
For a straight shot, I think your exposure compromise is very good. Always hard to not lose all detail in the snow while trying to show some detail in the blacks.
Tony's idea would allow a bit more detail i the snow. It is really just the area under the bill that needs a bit of help, IMO.
Always nice to start off the day with a nice photograph in the backyard!