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--_000_92470D8023567B4D8D50FBA6E5E9D00F0EB2CB013FHCXMSP1calmco_
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Hi James,
James Hirtle wrote:
> I know that during migration in May we had many bad storms and from some =
of the comments online, I got the
> impression that large numbers of our returning migrants overshot and wer=
e blown out to sea and probably did
> not make it back to land. This might account for the lack of birds that=
we are seeing now and also over the summer.
> I would like other thoughts on this. Lance or Ian might be able to tell =
us if this is a possibility. I look forward to other
> thoughts about this.
Only the results from bird surveys such as the Breeding Bird Survey will de=
termine if there was an observable impact this year. The Nova Scotia, long =
term, breeding bird survey trends for the majority of bird species show a l=
ong term decrease (about 61% of the species). Our own work on Brier Island =
for the last 30+ years shows a long term, annual reduction in the total num=
ber of birds we are encountering of about 2%. This means that we are encoun=
tering about half the number of birds that we did 30 years ago. This trend =
is pretty consistent in the medium term (since 1999) so it appears that for=
the moment, we haven't detected any increased reduction that the more seve=
re weather Nova Scotia has been experiencing in recent years might have cau=
sed.
A reduction in the number of birds that make it to the breeding grounds may=
be compensated for somewhat if the breeding season is a good one but repea=
ted reductions will obviously eventually take their toll on the population.=
There are many factors that may affect bird populations negatively as well=
as positively. A severe weather event such as you're describing this spri=
ng might result in a lack of breeding birds in certain areas. It depends wh=
ere the birds were headed, how many individuals were involved, what were th=
e species involved and how many birds managed to return to land.
All the best,
Lance
--_000_92470D8023567B4D8D50FBA6E5E9D00F0EB2CB013FHCXMSP1calmco_
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nk=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span style=3D'f=
ont-family:"Calibri","sans-serif";color:#1F497D'>Hi James,<o:p></o:p></span=
></p><p class=3DMsoNormal><span style=3D'font-family:"Calibri","sans-serif"=
;color:#1F497D'><o:p> </o:p></span></p><p class=3DMsoNormal><span styl=
e=3D'font-family:"Calibri","sans-serif";color:#1F497D'>James Hirtle wrote:<=
o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'font-family:"Calib=
ri","sans-serif";color:#1F497D'>></span><span style=3D'font-family:"Cali=
bri","sans-serif"'> I know that during migration in May we had many ba=
d storms and from some of the comments online, I got the <span style=3D'col=
or:#1F497D'><o:p></o:p></span></span></p><p class=3DMsoNormal><span style=
=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>>=
</span><span style=3D'font-family:"Calibri","sans-serif"'>impression that&=
nbsp;large numbers of our returning migrants overshot and were b=
lown out to sea and probably did <span style=3D'color:#1F497D'><o:p></o:p><=
/span></span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;font-=
family:"Calibri","sans-serif";color:#1F497D'>> </span><span style=3D'fon=
t-family:"Calibri","sans-serif"'>not make it back to land. This=
might account for the lack of birds that we are seeing now and also over t=
he summer. <span style=3D'color:#1F497D'><o:p></o:p></span></span></p=
><p class=3DMsoNormal><span style=3D'font-size:11.0pt;font-family:"Calibri"=
,"sans-serif";color:#1F497D'>> </span><span style=3D'font-family:"Calibr=
i","sans-serif"'>I would like other thoughts on this. Lance or Ian mi=
ght be able to tell us if this is a possibility. I look forward to ot=
her<span style=3D'color:#1F497D'><o:p></o:p></span></span></p><p class=3DMs=
oNormal><span style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";=
color:#1F497D'>></span><span style=3D'font-family:"Calibri","sans-serif"=
'> thoughts about this.<o:p></o:p></span></p><div><p class=3DMsoNormal><spa=
n style=3D'font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o=
:p></span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;font-fam=
ily:"Calibri","sans-serif";color:#1F497D'>Only the results from bird survey=
s such as the Breeding Bird Survey will determine if there was an observabl=
e impact this year. The Nova Scotia, long term, breeding bird survey trends=
for the majority of bird species show a long term decrease (about 61% of t=
he species). Our own work on Brier Island for the last 30+ years shows a lo=
ng term, annual reduction in the total number of birds we are encountering =
of about 2%. This means that we are encountering about half the number of b=
irds that we did 30 years ago. This trend is pretty consistent in the mediu=
m term (since 1999) so it appears that for the moment, we haven’t det=
ected any increased reduction that the more severe weather Nova Scotia has =
been experiencing in recent years might have caused.<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:"Calibri","sans-serif";color:#=
1F497D'>A reduction in the number of birds that make it to the breeding gro=
unds may be compensated for somewhat if the breeding season is a good one b=
ut repeated reductions will obviously eventually take their toll on the pop=
ulation. There are many factors that may affect bird populations negatively=
as well as positively. A severe weather event such as you’re d=
escribing this spring might result in a lack of breeding birds in certain a=
reas. It depends where the birds were headed, how many individuals were inv=
olved, what were the species involved and how many birds managed to return =
to land.<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=
:"Calibri","sans-serif";color:#1F497D'>All the best,<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:"Calibri","sans-serif";color:#=
1F497D'>Lance<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'font=
-family:"Calibri","sans-serif"'><br><br></span><span style=3D'font-family:"=
Calibri","sans-serif"'><o:p></o:p></span></p></div></div></body></html>=
--_000_92470D8023567B4D8D50FBA6E5E9D00F0EB2CB013FHCXMSP1calmco_--
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