birding-aus

Waders, their bills, on the breeding grounds

To: Jill Dening <>
Subject: Waders, their bills, on the breeding grounds
From: L&L Knight <>
Date: Tue, 30 Sep 2008 20:53:18 +1000
The breeding grounds vary somewhat between species. Some breed in the tundra or on mountain ridges - environments that are nothing like the habitats they winter in down here.

Regards, Laurie.

On 30/09/2008, at 7:59 PM, Jill Dening wrote:

Hi All,

I was recently asked a question about waders which totally fazed me. I was asked if the length of the bill of different species of wader is of any advantage on the breeding grounds.

This came up in respect to my saying that here, where waders live in coastal regions, the length of the bill can allow different species to feed together in intertidal estuaries without competing. I
described the intertidal substrate as like a department store with
several floors, where different species bought their food on
different floors. And then one thinking person asked the question
above.

I want to be able to get back to this person with an answer. I
didn't find any reference to it in my library. I have never been to the breeding grounds, but there the waders are scattered over thousands of kms, where I imagine the bill length is no competitive advantage. They are not communal breeders. I have never heard the
bill length discussed in any context relating to the breeding grounds.

Can anyone help? Can the bill length help some species to eat
certain food on the breeding grounds?

Cheers,

Jill
 --
Jill Dening
Sunshine Coast, Queensland, Australia

26° 51' 41"S  152° 56' 00"E
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