[NatureNS] re "wigeon" vs. "widgeon"; and also structural colours

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Date: Mon, 29 Feb 2016 14:15:57 -0400
From: chris kennedy <cjkennedy66@gmail.com>
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RE: Jim Wolford

While I agree that the different colours we perceive in the heads of many
waterfowl species, as well as grackles and hummingbirds, is a result of the
structural colouration. Why then do Blue jays, which I understand don't
have any blue pigment to them at all and are also 'coloured' by the
phenomena of structural colouration, never appear to have a glimmer of
different colour to them?

Chris Kennedy in Dartmouth



On Mon, Feb 29, 2016 at 1:36 PM, Jim Wolford <jimwolford@eastlink.ca> wrote=
:

> Paul, Your spelling of =E2=80=9Cwigeon=E2=80=9D on the video is the corre=
ct current
> spelling of what used to be spelled =E2=80=9Cwidgeon=E2=80=9D =E2=80=94 I=
 think I prefer the older
> spelling =E2=80=94 this species also used to be called =E2=80=9Cbaldpate=
=E2=80=9D from the white
> stripe on the top of the head.
>
> I=E2=80=99ll also add here, in relation to your =E2=80=9Cpurple-headed ma=
llard=E2=80=9D video,
> that structural colours in birds are very changeable in terms of how we
> perceive them, depending on the quality and direction of the light and th=
e
> consequent reflections.  The same is true for the heads of goldeneyes and
> common mergansers & grackles & gorgettes of hummingbirds, etc. etc.
>
> Cheers from Jim in Wolfville.
>
> On Feb 29, 2016, at 1:00 PM, Paul Ruggles <cpruggles@eastlink.ca> wrote:
>
> > Yikes! Sorry Can't spell!
> > Paul.
> > On 2016-02-29, at 12:54 PM, Paul Ruggles wrote:
> >
> >> Hi all,
> >> Saw a lone Widgeon in a large group of mallards on the weekend. Have
> posted a video on my you tube site.
> >> Paul.
> >>
> >> https://www.youtube.com/channel/UCN9vPZWRq8auD66f8rfEKeQ
> >>
> >
>
>

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<div dir=3D"ltr"><div><div>RE: Jim Wolford<br><br></div>While I agree that =
the different colours we perceive in the heads of many waterfowl species, a=
s well as grackles and hummingbirds, is a result of the structural colourat=
ion. Why then do Blue jays, which I understand don&#39;t have any blue pigm=
ent to them at all and are also &#39;coloured&#39; by the phenomena of stru=
ctural colouration, never appear to have a glimmer of different colour to t=
hem?<br><br></div>Chris Kennedy in Dartmouth<br><br><br></div><div class=3D=
"gmail_extra"><br><div class=3D"gmail_quote">On Mon, Feb 29, 2016 at 1:36 P=
M, Jim Wolford <span dir=3D"ltr">&lt;<a href=3D"mailto:jimwolford@eastlink.=
ca" target=3D"_blank">jimwolford@eastlink.ca</a>&gt;</span> wrote:<br><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #cc=
c solid;padding-left:1ex">Paul, Your spelling of =E2=80=9Cwigeon=E2=80=9D o=
n the video is the correct current spelling of what used to be spelled =E2=
=80=9Cwidgeon=E2=80=9D =E2=80=94 I think I prefer the older spelling =E2=80=
=94 this species also used to be called =E2=80=9Cbaldpate=E2=80=9D from the=
 white stripe on the top of the head.<br>
<br>
I=E2=80=99ll also add here, in relation to your =E2=80=9Cpurple-headed mall=
ard=E2=80=9D video, that structural colours in birds are very changeable in=
 terms of how we perceive them, depending on the quality and direction of t=
he light and the consequent reflections.=C2=A0 The same is true for the hea=
ds of goldeneyes and common mergansers &amp; grackles &amp; gorgettes of hu=
mmingbirds, etc. etc.<br>
<br>
Cheers from Jim in Wolfville.<br>
<br>
On Feb 29, 2016, at 1:00 PM, Paul Ruggles &lt;<a href=3D"mailto:cpruggles@e=
astlink.ca">cpruggles@eastlink.ca</a>&gt; wrote:<br>
<br>
&gt; Yikes! Sorry Can&#39;t spell!<br>
&gt; Paul.<br>
&gt; On 2016-02-29, at 12:54 PM, Paul Ruggles wrote:<br>
&gt;<br>
&gt;&gt; Hi all,<br>
&gt;&gt; Saw a lone Widgeon in a large group of mallards on the weekend. Ha=
ve posted a video on my you tube site.<br>
&gt;&gt; Paul.<br>
&gt;&gt;<br>
&gt;&gt; <a href=3D"https://www.youtube.com/channel/UCN9vPZWRq8auD66f8rfEKe=
Q" rel=3D"noreferrer" target=3D"_blank">https://www.youtube.com/channel/UCN=
9vPZWRq8auD66f8rfEKeQ</a><br>
&gt;&gt;<br>
&gt;<br>
<br>
</blockquote></div><br></div>

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