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Hi Jamie,
My take on this is that while this may be a food/territory driven phenomena=
it is not simply a case of Snowy Owls, mostly young, being driven south to=
never return. From my experience in the Montreal Region, many owls make th=
e trip south each year and have done so for a number of years. This has bee=
n confirmed through individuals with unique physical characteristics that c=
ould be used to identify them. They stay for the winter months and then hea=
d back north. At least I believe they head back north. They certainly leave=
southern Quebec.
Whether some of these birds remain through the summer or not is another mat=
ter. There are a number of bird families that irrupt south. Along these lin=
es, every year Ron Pittaway publishes the winter finch forecast which predi=
cts which finch species will irrupt south in the coming winter. In most cas=
es the birds that irrupt south and survive head back north. However there a=
re a number of cases where northern species have bred in the south. In Nova=
Scotia I would bet that a lot/most of the mainland Evening Grosbeaks that =
are still breeding are a result of a huge irruption that took place through=
out eastern Canada in the 1970s (I think that's the time frame).
So I'd say that irruptions serve both an immediate survival role, sending e=
xcess population to other areas in search of food, and a mechanism that may=
result in an expansion of the species' range. Some of Nova Scotia's Snowy =
Owls may stay through the summer and perhaps survive. Some may leave and re=
turn again next year.
All the best,
Lance
Lance Laviolette
Glen Robertson, Ontario
From: naturens-owner@chebucto.ns.ca [mailto:naturens-owner@chebucto.ns.ca] =
On Behalf Of Shouty McShoutsalot
Sent: Tuesday, March 11, 2014 8:43 AM
To: naturens
Subject: EXTERNAL: Re: [NatureNS] Surviving Snowy Owls - What Next?
My understanding is that irruption and migration are two very different beh=
aviors, and that irruption is a diaspora - the animal leaves because it is =
forced to, with no predefined destination as exists in a migration, and thu=
s no instinct to return to it's point of origin.
On 10 March 2014 14:24, Paul Ruggles <cpruggles@eastlink.ca<mailto:cpruggle=
s@eastlink.ca>> wrote:
Jamie,
I have been videoing two snowys for over a month at Lawrencetown beach. The=
y seem to have moved away in the past 2 weeks. I thought they might have be=
gun their migration back to the tundra? Have any of you seen any lately?
Paul.
On 2014-03-10, at 11:30 AM, Shouty McShoutsalot wrote:
> My understanding is that there are surviving overwintered Snowy Owls in N=
S from the irruption of Dec 2013; that these birds are not migratory in th=
e normal sense; that an irruption is not a predictable, repeatable migrator=
y event; and that, having survived a winter that I believe was fatal to a h=
igher than normal percentage of our resident bird predators, the surviving =
Snowys have proven adaptive and survival skills in NS.
>
> So I'm wondering what becomes of these birds. Will they become residents=
like our other Owl species, perhaps establishing territory and reproducing=
? Will they return from whence they came even if they are not possessed of=
migratory instinct? Or are they doomed to wander in exile alone forever?
>
> Regards
>
> --
> Jamie Simpson
> Hantsport, NS
--
Jamie Simpson
Hantsport, NS
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nk=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span style=3D'f=
ont-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi Jamie,=
<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;=
font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span><=
/p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;font-family:"Calibr=
i","sans-serif";color:#1F497D'>My take on this is that while this may be a =
food/territory driven phenomena it is not simply a case of Snowy Owls, most=
ly young, being driven south to never return. From my experience in the Mon=
treal Region, many owls make the trip south each year and have done so for =
a number of years. This has been confirmed through individuals with unique =
physical characteristics that could be used to identify them. They stay for=
the winter months and then head back north. At least I believe they head b=
ack north. They certainly leave southern Quebec.<o:p></o:p></span></p><p cl=
ass=3DMsoNormal><span style=3D'font-size:11.0pt;font-family:"Calibri","sans=
-serif";color:#1F497D'><o:p> </o:p></span></p><p class=3DMsoNormal><sp=
an style=3D'font-size:11.0p