Tail feather of Columba livia (domestic rock dove)

Calamus (Mag 1X, Zoom 3X) trans illum.	Rachis and Barbs of two Vanes (Mag 1.2X, Zoom 3X) trans.
Barbs and Barbules of a Vane (Mag 3X, Zoom 3X) trans illum.	Barbs and Barbules (Mag 2.0, Zoom 3.0) trans illum.