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Hi Dave S & All, May 2, 2012
It is my understanding, based on a brief tour of the internet, that =
Swifts do not nest in communal roosts these being of importance during =
migration i.e. points between the breeding areas and South America [or =
perhaps a place for Swifts that can't find nesting sites to hang out].
For the rearing of young (please correct me if I have this wrong) =
they need a suitable nesting site for each breeding pair (hollow trees =
or equivalent). In view of changes over the last 70 years, this I =
suspect is the critical resource.=20
I found a few descriptions of artificial nesting sites that should =
work but none that had been proven to work. Both hollow trees and =
chimneys have in common a comparatively good heat storage capacity. [If =
you burn much energy feeding on the wing then you have less energy to =
keep you warm at night. Consequently I suspect a suitable nest would =
have to be designed to capture and store insolation energy.
Yt, Dave Webster, Kentville=20
----- Original Message -----=20
From: Dave&Jane Schlosberg=20
To: naturens@chebucto.ns.ca=20
Sent: Wednesday, May 02, 2012 9:54 PM
Subject: [NatureNS] Roosting sites for chimney swifts
Chris,
Thanks for your fine article in published in the Ecology Global =
Network.
One thing that came up in that article was the matter of roosting =
sites for chimney swifts.
Here=E2=80=99s a question I=E2=80=99d like to throw out to the Talk =
List: Has there been any serious thought and/or efforts to build =
man-made sites in areas which lack enough hollow trees or tall disused =
chimneys? (The Halifax area would appear to be such a place, I suppose.)
How many chimneys (or equivalent structures) such as the ones in =
Wolfville and New Glasgow would it take for Nova Scotia to bring back =
the highest possible numbers of chimney swiftes given their present day =
low numbers?
Yours...Dave Schlosberg
From: Christopher Majka=20
Sent: Wednesday, May 02, 2012 2:35 PM
To: naturens@chebucto.ns.ca=20
Subject: [NatureNS] International Dawn Chorus Day (May 6th)
Hi folks,=20
I'm honoured that the Global Ecology Network has reprinted my article =
"Quiet Spring: Fifty Years Since Rachel Carson" in the context of =
celebrating "International Dawn Chorus Day" (May 6th), a day which =
encourages people to rise at dawn to listen to the chorus of songbirds =
which greets the break of day.=20
In addition to drawing attention to this natural phenomenon (which we =
too often miss if we sleep late, or else take for granted), there is a =
serious element to this event, drawing attention to the dangers that =
songbirds face and the ongoing decline that many species are =
experiencing due to habitat loss, pesticides, and climate change.
Quiet Spring: Fifty Years Since Rachel Carson
http://www.ecology.com/2012/04/30/quiet-spring-fifty-years-rachel/
May 6th is International Dawn Chorus Day
http://www.ecology.com/2012/05/02/6th-international-dawn-chorus/
Best wishes,
Chris
Christopher Majka
6252 Jubilee Rd., Halifax, Nova Scotia, Canada B3H 2G5
c.majka@ns.sympatico.ca
When it is dark enough, you can see the stars. - Persian Proverb
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<DIV><FONT size=3D2>Hi Dave S & All, =
=20
=
May=20
2, 2012</FONT></DIV>
<DIV><FONT size=3D2> It is my understanding, based on =
a brief=20
tour of the internet, that Swifts do not nest in communal =
roosts these=20
being of importance during migration i.e. points between the =
breeding areas=20
and South America [or perhaps a place for Swifts that can't find nesting =
sites=20
to hang out].</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=3D2> For the rearing of young (please =
correct me=20
if I have this wrong) they need a suitable nesting site for each =
breeding=20
pair (hollow trees or equivalent). In view of changes over the last =
70=20
years, this I suspect is the critical resource. </FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2> I found a few descriptions of =
artificial=20
nesting sites that should work but none that had been proven to work. =
Both=20
hollow trees and chimneys have in common a comparatively good heat =
storage=20
capacity. [If you burn much energy feeding on the wing then you =
have less=20
energy to keep you warm at night. Consequently I suspect a suitable =
nest=20
would have to be designed to capture and store insolation =
energy.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2> Yt, Dave Webster,=20
Kentville</FONT> </DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; =
PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px"=20
dir=3Dltr>
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: =
black"><B>From:</B>=20
<A title=3Ddschlosb-g@ns.sympatico.ca=20
href=3D"mailto:dschlosb-g@ns.sympatico.ca">Dave&Jane =
Schlosberg</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dnaturens@chebucto.ns.ca=20
href=3D"mailto:naturens@chebucto.ns.ca">naturens@chebucto.ns.ca</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Wednesday, May 02, 2012 =
9:54=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [NatureNS] Roosting =
sites for=20
chimney swifts</DIV>