I don't know that we can do any better than Geoffrey's wording: "are
occasionally reported". I think I have seen one or two. Sometimes repeat
sightings of the same bird or sometimes, being genetic, it could be carried by
parents, children, siblings.... These changes are generally due to a deficiency
in one colour system, that results in another colour system showing.
Philip
-----Original Message-----
From: Barry Millar
Sent: Sunday, 24 July, 2022 6:17 AM
To: Philip Veerman
Cc: ;
Subject: Re: [Canberrabirds] FW: King Parrot with yellow markings
Many thanks to everyone who responded.
Philip, how rare is this? Since living in Canberra and Queanbeyan from 1969
and having hundreds of KPs visit our gardens this is the first that I’ve seen.
Cheers
Barry
Sent from my iPad
> On 23 Jul 2022, at 22:05, Philip Veerman <> wrote:
>
> The basic answer it is a colour mutation, in this case a deficiency in the
> production of structural blue. Though in this bird it is randomly patchy and
> that aspect is not very often shown. The normal green is produced by yellow
> pigment combined with structural blue (that means the blue colour produced by
> feather structure, rather than pigment). Where the structural blue is absent
> (in those patches), the bits that should be green only have the yellow
> pigment remaining, to provide the yellow colour. It is basically the same
> process that produces an all yellow, rather than mostly green, budgerigar.
>
> Philip
>
> -----Original Message-----
> From: Canberrabirds
> On Behalf Of
> Sent: Saturday, 23 July, 2022 9:02 PM
> To: ;
> Subject: [Canberrabirds] FW: King Parrot with yellow markings
>
> Hi Barry - I am forwarding your message to COG's chatline and will pass on
> any responses that might help with your question. Cheers, Julian Robinson
>
> Chatliners - Any more informed thoughts than I can offer would be appreciated.
>
> -----Original Message-----
> From: Barry Millar <>
> Sent: Saturday, 23 July 2022 3:57 PM
> To:
> Subject: King Parrot with yellow markings
>
> This bird is a frequent visitor to our garden in Isabella Plains. Can
> someone please explain the bright yellow markings that almost form a solid
> band across the wings when fully closed.
>
> Barry Millar
>
>
>
>
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