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--001a11435e36f270c6052ceca3f9 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable 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 > >> > > > > --001a11435e36f270c6052ceca3f9 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable <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't have any blue pigm= ent to them at all and are also 'coloured' 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"><<a href=3D"mailto:jimwolford@eastlink.= ca" target=3D"_blank">jimwolford@eastlink.ca</a>></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 & grackles & 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 <<a href=3D"mailto:cpruggles@e= astlink.ca">cpruggles@eastlink.ca</a>> wrote:<br> <br> > Yikes! Sorry Can't spell!<br> > Paul.<br> > On 2016-02-29, at 12:54 PM, Paul Ruggles wrote:<br> ><br> >> Hi all,<br> >> Saw a lone Widgeon in a large group of mallards on the weekend. Ha= ve posted a video on my you tube site.<br> >> Paul.<br> >><br> >> <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> >><br> ><br> <br> </blockquote></div><br></div> --001a11435e36f270c6052ceca3f9--
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