YBS

Yellow-bellied Sapsucker (Sphyrapicus varius) showing the yellow belly for a change. I’m assuming this is a female working towards adult plumage.

Sapsucking. The bird drills out holes to pool sap, which she eats, along with any insects attracted to the sap. (We’ve had some Diptera still flying in this mild Decemeber.) Yews (Taxus) are particularly well-tapped in Green-Wood.
But these holes were made in an exotic fir.
Interestingly, this Caucasian fir (Abies nordmanniana) was right next to another that was not riddled with holes like this.