juvenal plumage

American  

[joo-vuh-nl] / ˈdʒu və nl /

noun

Ornithology.

1. the first plumage of birds, composed of contour feathers, which in certain species follows the naked nestling stage and in other species follows the molt of natal down.

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Etymology

Origin of juvenal plumage

< Latin juvenālis youthful, equivalent to juven ( is ) young man or woman + -ālis -al ¹

Example Sentences

Two of the specimens from the Cocoa Research Station are in juvenal plumage, indicating that this species probably breeds in the area.

From Birds from North Borneo University of Kansas Publications, Museum of Natural History, Volume 17, No. 8, pp. 377-433, October 27, 1966 by Thompson, Max C.

The actual evidence was provided by females with active brood patches or active ovaries, males with enlarged testes, birds in juvenal plumage, or birds actively in annual molt.

From Birds from North Borneo University of Kansas Publications, Museum of Natural History, Volume 17, No. 8, pp. 377-433, October 27, 1966 by Thompson, Max C.

On this date the juvenal plumage was only partly developed and the young bird was incapable of flight.

From Natural History of the Bell Vireo, Vireo bellii Audubon by Barlow, Jon C.

Perhaps half the birds seen were in juvenal plumage.

From Vertebrates from the Barrier Island of Tamaulipas, M?xico by Johnston, Richard F.

On October 3, 1962, I saw two adults with two young in nondescript juvenal plumage with virtually no markings and a pale yellow color, unlike that of the adults.

From Birds from North Borneo University of Kansas Publications, Museum of Natural History, Volume 17, No. 8, pp. 377-433, October 27, 1966 by Thompson, Max C.