We've had single-digit temperatures on several recent days here in southeastern Ohio. On one such frigid morning, I took this photograph of a fluffed-up tufted titmouse, visiting the suet dough tray on the front porch.
It was so cold... (How cold WAS it?)
It was so cold, that you could actually see the bird's cleavage.
I could go on, but won't, in the fast-fading spirit of the season.