birding-aus

Waterfowl - how do they know??

To: "Birding-aus" <>
Subject: Waterfowl - how do they know??
From: "sonnenburg" <>
Date: Wed, 10 May 2000 15:30:45 +1000
I have been asked how birds such as Australian Pelicans know when inland lakes such as Lake Eyre are full when it often has not rained within many hundreds of Kms of the area.  They take advantage of these conditions to breed and come from near and far.  I have consulted HANZAB and other texts to no avail. 
 
Any clues anyone?   Or as with many things avian do we just don't know?
 
Cheers
 
Roy Sonnenburg
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