(On a bird) a gland at the base of the tail that produces the oil used in preening.
- However, perhaps the plumage of birds with preen glands is more resilient to abrasion from preening.
- Our results provide the first rigorous evidence that the preen gland is important for plumage condition in birds other than waterfowl.
- More work is needed on the function and distribution of preen glands in Rock Doves and across other species of birds.
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