For sharpless side challenge. This is from last December. We heard a persisiting tapping/hammering on a tree outside our house Christmas moring. When this bird gets going, his head looks blurred to the naked eye as well as to the camera.
Admittedly, a bit of camera shake is visible too despite vibration reduction (hey, it was cold on the balcony, the light wasn't great, and there weren't many options for better positioning).