A pair of Red-bellied woodpeckers at the feeders this weekend (male at left, female at right)
I have also seen a pair of male and female Northern Flickers (yellow-shafted variety) in the yard this weekend, which is a huge treat because they don't visit our woods very often. Another pair of note is a male and female Eastern Towhee.
The color red
"My" Carolina Wren pair, both sharing bites from a homemade suet block. These two stole my heart this morning. (Sorry for the poor picture quality.)
While I have no evidence that any of the above-mentioned couples are mating pairs, the fact that I see them only in pairs (i.e. no 3rd wheel bird of the same species) makes me awfully suspicious that they are mated pairs. I can hope, right?
Happy Valentine's Day!