More on darkening bills

To: <>
Subject: More on darkening bills
From: "Geoffrey Dabb" <>
Date: Tue, 22 Feb 2011 16:56:10 +1100

More, that is, following my contribution on Swift Parrots.  HANZAB mentions the ‘possibility’ (‘further study needed’) that adult Dbs develop ‘varying degrees of dark marking to bills in non-breeding areas’.  The first 2 birds below show at least the beginnings of such markings.  The first was an adult with dep young, Campbell Park, 25 Jan 11, second  a bird on my backyard powerlines this morning.  The 2 birds on the right with the usual bright orange bills were snapped locally earlier  in the  breeding season.  With Swift Parrots the darkening occurs with the approach of breeding.


xx db head J_.jpg

<Prev in Thread] Current Thread [Next in Thread>
  • More on darkening bills, Geoffrey Dabb <=

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the Canberra Ornithologists Group mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the list contact David McDonald, list manager, phone (02) 6231 8904 or email . If you can not contact David McDonald e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU