Preening Gland

anatomy

Definition

The preening gland (uropygial gland) is an oil-producing gland located at the base of a penguin's tail. Penguins spread this oil across their feathers with their beak to maintain waterproofing and insulation. The oil creates a hydrophobic barrier that prevents cold seawater from reaching the skin and downy underlayer. Damage to the preening gland or contamination by oil spills can destroy a penguin's waterproofing, leading to hypothermia and death. Regular preening is an essential daily behaviour for every penguin species.

Related Terms

Moulting is the annual process in which penguins shed and replace all of their feathers over a period of two to four weeks.

Countershading is a camouflage strategy in which an animal's dorsal (back) side is dark and its ventral (belly) side is light.

Related Species

Species where preening gland is especially relevant.

African Penguin Little Blue Penguin

Frequently Asked Questions

What does preening gland mean in penguin biology?

The preening gland (uropygial gland) is an oil-producing gland located at the base of a penguin's tail. Penguins spread this oil across their feathers with their beak to maintain waterproofing and insulation. The oil creates a hydrophobic barrier that prevents cold seawater from reaching the skin and downy underlayer. Damage to the preening gland or contamination by oil spills can destroy a penguin's waterproofing, leading to hypothermia and death. Regular preening is an essential daily behaviour for every penguin species.

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