next message in archive
next message in thread
previous message in archive
previous message in thread
Index of Subjects
> 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 <span dir=3D"ltr= "><<a href=3D"mailto:jameslchurchill@gmail.com" target=3D"_blank">jamesl= churchill@gmail.com</a>></span> 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, <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. </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:= <i>link </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 <i>Felis catus</i> is her= e<i>: