[NatureNS] Vancouver has new "bird strategy"

From: Patrick Kelly <Patrick.Kelly@Dal.Ca>
To: "<naturens@chebucto.ns.ca>" <naturens@chebucto.ns.ca>
Thread-Topic: [NatureNS] Vancouver has new "bird strategy"
Thread-Index: AQHRVli+c+lJjvvackKbbpjGzdN2MQ==
Date: Mon, 25 Jan 2016 15:32:41 +0000
References: <CAL4T0NxZFnr3B_ZPmxenDge14oFW48NSDW0HT2zdgF2-==049A@mail.gmail.com>
Accept-Language: en-CA, en-US
authentication-results: spf=none (sender IP is )
received-spf: None (protection.outlook.com: Dal.Ca does not designate
spamdiagnosticoutput: 1:23
spamdiagnosticmetadata: NSPM
Precedence: bulk
Return-Path: <naturens-mml-owner@chebucto.ns.ca>
Original-Recipient: rfc822;"| (cd /csuite/info/Environment/FNSN/MList; /csuite/lib/arch2html)"

next message in archive
next message in thread
previous message in archive
previous message in thread
Index of Subjects

&gt; irresponsible owners are exactly that. Myself, living in
--_000_CC44ACD827F44576A27731817DFBA3BAdalca_
Content-Type: text/plain; charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable

James Churchill can't post a reply for some reason and has asked me to do s=
o for him=85


On Mon, Jan 25, 2016 at 9:41 AM, James Churchill <jameslchurchill@gmail.com=
<mailto:jameslchurchill@gmail.com>> wrote:
(*hi folks, my original message did not get through so I've, sadly, removed=
 the links (see below):


folks,
I agree that anecdotes will not get us very far on this one, since most of =
the impacts from cats go unwitnessed by us day to day.

For anyone interested in seeing the research these national estimates are b=
ased on, it's open source and can be found here: link (or by using the sear=
ch terms: 'quantifying human related mortality of birds in Canada').

The paper on Felis catus is here: link (or use this search term: 'Estimated=
 Number of Birds Killed by House Cats (Felis catus) in Canada')

True, forest loss and fragmentation, and climate change are not included in=
 these comparisons, but despite that, it is good to know what '196 million =
birds' (estimated annual mortality from owned + feral cats) actually looks =
like to see if it is worth our time. If we don't really have a good sense o=
f what '196 million birds' is, or, think that it is a negligible amount the=
n it's easy to pass off.

Take a look at some population estimates for our Canadian birds by searchin=
g for 'Partners in Flight Population Estimates database' (Halfway down page=
 you will see 'to begin querying the database click here'; look in Canada c=
olumn). Details on methods of deriving these estimates can be found there a=
s well.

For context, here's how 196 million annual mortalities lines up to PIF Cana=
dian population estimates for various species (clearly, some species would =
be more vulnerable than others):

PIF Canadian population estimates for some NS species of concern...
Tree Swallow - 7.6 (M)illion
Barn Swallow - 5 M
Chimney Swift - 0.08 M
Common Nighthawk - 0.9 M

PIF Canadian population estimates for some species nesting near the ground =
in my neighbourhood:
American Robin - 140 M
Black-capped Chickadee - 20 M
Chestnut-sided Warbler - 13 M
Gray Catbird - 3.6 M
Great-crested Flycatcher - 0.59 M
Northern Cardinal - 0.5 M

(now we're at 191 M...)
...

As the authors of the above paper point out, this is also just the tip of t=
he cat-impact iceberg: "Because most bird species in Canada are migratory, =
including most species that are potentially vulnerable to cat predation, ma=
ny birds will be subject to additional cat predation after they leave Canad=
a, particularly as they migrate through and/or winter in the U.S., where nu=
mbers of pet cats and especially feral cats are much higher. Thus the propo=
rtion of Canada=92s birds killed by cats will be higher than estimated abov=
e using predation rates in Canada alone."

james


=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

Patrick Kelly

Director of Computer Facilities

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

Faculty of Architecture and Planning

Dalhousie University

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

MAIL                                   COURIER

PO Box 15000                           5410 Spring Garden Road

Halifax, Nova Scotia B3H 4R2           Halifax, Nova Scotia

Canada                                 Canada

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

Phone:(902) 494-3294    FAX:(902) 423-6672   E-mail:patrick.kelly@dal.ca

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D


--_000_CC44ACD827F44576A27731817DFBA3BAdalca_
Content-Type: text/html; charset="Windows-1252"
Content-ID: <4A60C5D443073D4ABA8E907E98D803DE@namprd03.prod.outlook.com>
Content-Transfer-Encoding: quoted-printable

<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
252">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; ">
James Churchill can't post a reply for some reason and has asked me to do s=
o for him=85
<div><br>
</div>
<div><br>
</div>
<div>On Mon, Jan 25, 2016 at 9:41 AM, James Churchill&nbsp;<span dir=3D"ltr=
">&lt;<a href=3D"mailto:jameslchurchill@gmail.com" target=3D"_blank">jamesl=
churchill@gmail.com</a>&gt;</span>&nbsp;wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin-top: 0px; margin-right: 0=
px; margin-bottom: 0px; margin-left: 0.8ex; border-left-width: 1px; border-=
left-color: rgb(204, 204, 204); border-left-style: solid; padding-left: 1ex=
; position: static; z-index: auto; ">
<div dir=3D"ltr">
<div class=3D"gmail_quote">(*hi folks, my original message did not get thro=
ugh so I've, sadly, removed the links (see below):</div>
<div class=3D"gmail_quote"><br>
<br>
<div dir=3D"ltr">folks,&nbsp;
<div>
<div class=3D"gmail_extra">I agree that anecdotes will not get us very far =
on this one, since most of the impacts from cats go unwitnessed by us day t=
o day.&nbsp;</div>
<div class=3D"gmail_extra"><br>
</div>
<div class=3D"gmail_extra">For anyone interested in seeing the research the=
se national estimates are based on, it's open source and can be found here:=
&nbsp;<i>link&nbsp;</i>(or by using the search terms: 'quantifying human re=
lated mortality of birds in Canada').</div>
<div class=3D"gmail_extra"><br>
</div>
<div class=3D"gmail_extra">The paper on&nbsp;<i>Felis catus</i>&nbsp;is her=
e<i>: