Some technical questions about the definition of life stages in birds

To: COG list <>
Subject: Some technical questions about the definition of life stages in birds
From: Con Boekel <>
Date: Mon, 25 Aug 2014 18:12:46 +1000
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?



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