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More material of this species
- 4.9A juvenile man...France, Dec 2006
- 4.6A juvenile swa...France, Dec 2006
- 4.4A juvenile man...France, Dec 2006
- 4Gavia immer or...USA, Jul 2008
- 4JuvenileGermany, Dec 2008
- 4A winter adult...USA, Dec 2008
- 4A winter adult...USA, Dec 2008
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Great Northern Diver (Gavia immer) video
Caption
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.
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