Juvenile[]
See here.
Post-juvenile[]
See here.
Young[]
See here.
Immature[]
See here.
1st-autumn[]
A bird it its first autumn, 2-5 months old. It refers to its age and not its plumage [1].
1st-winter[]
An age category usually referring to the plumage following that of a juvenile bird, usually gained through a partial or complete (in some species) moult in late summer/autumn of the 1st calendar year and is worn until the next spring of the 2nd calendar year [1].
1st-summer[]
An age category usually referring to the plumage worn at the approximate age of one year and attained in late winter/spring through partial or complete moult from 1st winter plumage; worn into the next moult usually in late summer/autumn of the same year, replaced with the 2nd winter plumage [1].
2nd-winter[]
A complete or partial moult in late summer of the 2nd calendar year and worn until the next moult, it is followed by the 1st-summer plumage [1]
2nd-summer[]
References[]
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This article is part of Project Glossary, an All Birds project that aims to write comprehensive articles on each term related to animals. |
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