Kookaburra chick agression

Subject: Kookaburra chick agression
From: Steve Clark <>
Date: Tue, 15 Nov 2005 17:14:57 -0700
G'day all

On TV last night (ABC - Sex in the Bush) there was discussion of how the first
Kookaburra chick to hatch will try to kill its siblings.

Would it be correct that the eggs hatch in the order they were laid?  If so then
the first chick to hatch would be bigger than the others just because it is
older.  What is the evolutionary explanation for this?  What is the guarantee
that the first chick to hatch has the best genes?  Given an equal start, one of
the others might have the best genes?  After all, chances are they all have
different fathers.

Am I missing something?


Steve Clark
Hamilton, Victoria
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