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Hi John & All, June 19, 2013
The 'mystery' of there being fewer birds where cicadas are present =
disappears in an apocalyptic inversion if this relationship is viewed as =
a case of 'cicadas being present where birds are less abundant'.
If the cicada-eating bird population in an area is high enough then =
cicadas will be eaten shortly after emergence (when their exoskeleton is =
still relatively soft) leading to many birds and few or no cicadas. If =
the opposite holds; low population of cicada-eating birds in an area =
then many cicadas will survive leading to few birds and many cicadas.=20
Yt, Dave Webster
----- Original Message -----=20
From: John Kearney=20
To: naturens@chebucto.ns.ca=20
Sent: Wednesday, June 19, 2013 4:27 PM
Subject: [NatureNS] Dawn Chorus and Cicadas
Reference to an interesting article relating the disappearance of =
birds to Cicada blooms
=
http://blogs.discovermagazine.com/crux/2013/06/18/the-cicada-paradox#.UcI=
E2djNkpZ
=20
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.3345 / Virus Database: 3199/6423 - Release Date: =
06/19/13
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<DIV><FONT size=3D2>Hi John & All, =
=20
=
June=20
19, 2013</FONT></DIV>
<DIV><FONT size=3D2> The 'mystery' of there =
being fewer=20
birds where cicadas are present disappears in an apocalyptic=20
inversion if this relationship is viewed as a case of 'cicadas =
being present where birds are less abundant'.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2> If the cicada-eating bird =
population in an=20
area is high enough then cicadas will be eaten shortly after =
emergence=20
(when their exoskeleton is still relatively soft) leading to many birds =
and few=20
or no cicadas. If the opposite holds; low population of cicada-eating =
birds in=20
an area then many cicadas will survive leading to few birds and many =
cicadas.=20
</FONT></DIV>
<DIV><FONT size=3D2>Yt, Dave Webster</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=3Djohn.kearney@ns.sympatico.ca=20
href=3D"mailto:john.kearney@ns.sympatico.ca">John Kearney</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, June 19, 2013 =
4:27=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [NatureNS] Dawn Chorus =
and=20
Cicadas</DIV>
<DIV><BR></DIV>
<DIV class=3DWordSection1>
<P class=3DMsoNormal><SPAN=20
style=3D"FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 11pt"=20
lang=3DEN-US>Reference to an interesting article relating the =
disappearance of=20
birds to Cicada blooms<o:p></o:p></SPAN></P>
<P class=3DMsoNormal><SPAN lang=3DEN-US><A=20
=
href=3D"http://blogs.discovermagazine.com/crux/2013/06/18/the-cicada-para=
dox#.UcIE2djNkpZ">http://blogs.discovermagazine.com/crux/2013/06/18/the-c=
icada-paradox#.UcIE2djNkpZ</A><o:p></o:p></SPAN></P>
<P class=3DMsoNormal><SPAN =
lang=3DEN-US><o:p> </o:p></SPAN></P></DIV><A></A>
<P align=3Dleft color=3D"#000000" avgcert??>No virus found in this=20
message.<BR>Checked by AVG - <A=20
href=3D"http://www.avg.com">www.avg.com</A><BR>Version: 2013.0.3345 / =
Virus=20
Database: 3199/6423 - Release Date: =
06/19/13</P></BLOCKQUOTE></BODY></HTML>
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