Can you identify this bird?

Hi Highland Park birders! Since working from home, we moved a feeder so I see it from my new home office. And watching all the birds has been awesome. I’ve had a bird show up a few times now which is pale blue and appears to pick at the trees like a woodpecker but doesn’t look like any pics in my Peterson field guide. Can you help ID it? Sorry the pics aren’t great. Through a window and the digital zoom isn’t as clear. Thx for any help!!