[NatureNS] re Surviving Snowy Owls - What Next?

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Date: Wed, 12 Mar 2014 10:08:44 -0300
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The species wide definition makes sense in differentiating, thanks again.

If you will indulge me here's a further question - is migration learned
behavior or evolutionary instinct - nurture or nature?

Regards

Jamie


On 11 March 2014 15:28, Laviolette, Lance (EXP)
<lance.laviolette@lmco.com>wrote:

> Jamie asked:
>
> *>*If birds go south in the fall and return north in the spring on a
> regular basis aren't they migrating and not irrupting?
>
>
>
> In the sense that migrating is the periodic movement from one region to
> another yes it is. However as Randy wrote I think that we usually apply
> migrating to an event that takes place on a species wide basis and on an
> annual basis. Using the term irruption implies to me that it isn't
> necessarily an annual event and that a variable number of the species
> engage in it. So for me, the northern species of owls 'irrupt' south
> periodically while Yellow Warblers migrate south to Central and South
> America annually (or more appropriately, Yellow Warblers migrate north
> where they spend 4-5 months breeding).
>
>
>
> Also, migration isn't always restricted to a north-south movement, even in
> Nova Scotia. Local movements around the province or even concentrations at
> certain food sources have been brought up in discussions before on
> NatureNS. These qualify as migration under the above definition. There are
> also longer, west to east movements that for example, result in ducks,
> grebes, loons, etc. wintering off of Nova Scotia's coasts.
>
>
>
> All the best,
>
>
>
> Lance
>



-- 
Jamie Simpson
Hantsport, NS

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<div dir=3D"ltr">The species wide definition makes sense in differentiating=
, thanks again.<div><br></div><div>If you will indulge me here&#39;s a furt=
her question - is migration learned behavior or evolutionary instinct - nur=
ture or nature?</div>
<div><br></div><div>Regards</div><div><br></div><div>Jamie</div></div><div =
class=3D"gmail_extra"><br><br><div class=3D"gmail_quote">On 11 March 2014 1=
5:28, Laviolette, Lance (EXP) <span dir=3D"ltr">&lt;<a href=3D"mailto:lance=
.laviolette@lmco.com" target=3D"_blank">lance.laviolette@lmco.com</a>&gt;</=
span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div lang=3D"EN-US" link=3D"blue" vlink=3D"p=
urple"><div><p class=3D"MsoNormal"><span style=3D"font-family:&quot;Cambria=
&quot;,&quot;serif&quot;;color:#1f497d">Jamie asked:<u></u><u></u></span></=
p>
<div class=3D""><div><div><p class=3D"MsoNormal"><b><span style=3D"font-fam=
ily:&quot;Cambria&quot;,&quot;serif&quot;;color:#1f497d">&gt;</span></b><sp=
an style=3D"font-family:&quot;Cambria&quot;,&quot;serif&quot;">If birds go =
south in the fall and return north in the spring on a regular basis aren&#3=
9;t they migrating and not irrupting?</span><span style=3D"font-family:&quo=
t;Cambria&quot;,&quot;serif&quot;"><u></u><u></u></span></p>
</div></div></div><div><div><p class=3D"MsoNormal"><span style=3D"font-size=
:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f497=
d"><u></u>&nbsp;<u></u></span></p><p class=3D"MsoNormal"><span style=3D"fon=
t-family:&quot;Cambria&quot;,&quot;serif&quot;;color:#1f497d">In the sense =
that migrating is the periodic movement from one region to another yes it i=
s. However as Randy wrote I think that we usually apply migrating to an eve=
nt that takes place on a species wide basis and on an annual basis. Using t=
he term irruption implies to me that it isn&rsquo;t necessarily an annual e=
vent and that a variable number of the species engage in it. So for me, the=
 northern species of owls &lsquo;irrupt&rsquo; south periodically while Yel=
low Warblers migrate south to Central and South America annually (or more a=
ppropriately, Yellow Warblers migrate north where they spend 4-5 months bre=
eding).<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Cambria&quot;,&quot=
;serif&quot;;color:#1f497d"><u></u>&nbsp;<u></u></span></p><p class=3D"MsoN=
ormal"><span style=3D"font-family:&quot;Cambria&quot;,&quot;serif&quot;;col=
or:#1f497d">Also, migration isn&rsquo;t always restricted to a north-south =
movement, even in Nova Scotia. Local movements around the province or even =
concentrations at certain food sources have been brought up in discussions =
before on NatureNS. These qualify as migration under the above definition. =
There are also longer, west to east movements that for example, result in d=
ucks, grebes, loons, etc. wintering off of Nova Scotia&rsquo;s coasts.<u></=
u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Cambria&quot;,&quot=
;serif&quot;;color:#1f497d"><u></u>&nbsp;<u></u></span></p><p class=3D"MsoN=
ormal"><span style=3D"font-family:&quot;Cambria&quot;,&quot;serif&quot;;col=
or:#1f497d">All the best,<span class=3D"HOEnZb"><font color=3D"#888888"><u>=
</u><u></u></font></span></span></p>
<span class=3D"HOEnZb"><font color=3D"#888888"><p class=3D"MsoNormal"><span=
 style=3D"font-family:&quot;Cambria&quot;,&quot;serif&quot;;color:#1f497d">=
<u></u>&nbsp;<u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-f=
amily:&quot;Cambria&quot;,&quot;serif&quot;;color:#1f497d">Lance<u></u><u><=
/u></span></p>
</font></span></div></div></div></div></blockquote></div><br><br clear=3D"a=
ll"><div><br></div>-- <br><div dir=3D"ltr"><div>Jamie Simpson<br></div>Hant=
sport, NS<br></div>
</div>

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