Thanks guys.
Sno... although I appreciate your appreciation of the realism, JFYI it isn't a compliment to compare a bird carving to taxidermy. "Wooden taxidermy" is actually pejorative when applied to a carving. A dead stuffed bird looks like a dead stuffed bird. The idea is to go beyond that and create the illusion of life out of a dead piece of wood. Carvers actually take great artistic liberties with nature. We have all kinds of tricks to lead the eye where we want it to go, even if it means skirting fidelity to the real thing. "Feather acceleration" is one of them. The patagial area of a wing doesn't really look like Bela's. It's much more chaotic. Increasing the size of each feather as it approaches the secondaries is more coherent to the eye.