The Tree Sparrows are Back!

Our cold frigid temperatures have returned and so have the Tree Sparrows.  Yesterday I was delighted to see Tree Sparrows feeding at our feeders.  I make a list of yard birds each day and January 11th., 2014, was the last day that Tree Sparrows had been included on my daily list of yard birds.  We had experienced quite a bit of mild temperatures during the past couple of weeks, however the thermometer outside my window yesterday was reading at -21 degrees C.  Tree Sparrows are little northern sparrows and I am assuming that they are more comfortable with the freezing temperatures.
Also yesterday I spied a Song Sparrow at one of our feeders.  The Song Sparrow had been missing recently too.  Now I wonder if the missing White-throated sparrow will make an appearance soon.  I haven't seen it for a week or more. I shall be watching and hoping for it to reappear.
Our usual daily feathered visitors are: Blue Jays, Mourning Doves, Chickadees , Hairy Woodpeckers and Downy Woodpeckers. Earlier this winter during the latter part of December we had both a White-breasted Nuthatch daily as well as a Red-breasted Nuthatch daily but they also have vacated Bird Alley.  I do hope they appear soon along with our pair of Northern Cardinals which also are missing.
We had many hungry Goldfinch at our feeders yesterday and their presence has not been much in evidence recently. I am eager for the dawn today to see what species appear .  It is an enjoyable daily task to make my list of yard birds!