ML201762351 IBC 1165405

הערות

A winter adult shown rubbing the side of its head across the preen gland, which is located at the base of the tail and.....produces a waxy oil that is then rubbed across the feathers using the side of the head, and also the bill, as a means of water proofing the feathers. Elevation: 24 m. Date added to IBC: June 22, 2016.