In the trajectory of a bird's life, some stages appear to be straight
forward. For example: egg/not egg; egg/nestling; alive/dead.
But beyond that, it gets tricky.
We have had on the chat line, for example, much discussion about how to
apply 'dependent' to the young of precocial species.
When does a nestling turn into a fledgling?
When does a fledgling turn into a juvenile?
When does a juvenile turn into an immature?
When does an immature turn into an adult?
Does COG (or a reputable scientific body accredited for the purpose by
COG) have a standard set of definitions for a bird's life stages?
regards
Con
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