Date: Thu, 4 Dec 2003 17:17:48 -0500 Reply-To: Maryland Birds & Birding Sender: Maryland Birds & Birding From: "Kurt. R. Schwarz" Subject: Re: RFI: Crow decline (?) information MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit It occurred to me the Cornell Lab's Project Feederwatch might yield some insight on potential American Crow decline as a result of West Nile. In general for most regions, the number of birds per feeder has remained flat since the project began. Also, most regions report an increase in the percentage of feeders visited. So Feederwatch does NOT seem to indicate a decline in Crows, whether form WNV or something else. The trends are plotted over a more than ten year period, and presumably include the winter 200-03, so perhaps before WNV set in with a vengeance. See http://birds.cornell.edu/pfw/DataRetrieval/trendgraphs/amecro.html Kurt Schwarz HowCo goawaybird@comcast.net ----- Original Message ----- From: "Gail Mackiernan" To: Sent: Thursday, December 04, 2003 2:19 PM Subject: [MDOSPREY] RFI: Crow decline (?) information > Hi all -- > > I as called by an elementary school teacher -- some of her students > are doing a project on on declines in numbers of crows after the West > Nile virus > hit this area. She asked if there was any source of data which could support > her students' non-quantitative observation that there are fewer crows around > now. The school (Bell Elementary) is in Rockville and I must say I > think there's been a reduction in crows coming to the (famous) > Rockville roost but > not sure if anyone has done any counts. Is there any hard data or even > fairly good observational info? > > Do any MDospreyers have any figures from either CBCs or other sources which > might give some comparison in crow numbers pre- and post-WNV? > > You can email me privately on this... > > Many thanks, let's keep those kids thinking about birds! > > Gail Mackiernan > Silver Spring, MD > > ====================================================================== > = > To leave the MDOsprey list, send e-mail to listserv@home.ease.lsoft.com > with the following message in line 1: signoff mdosprey > ======================================================================= ======================================================================= To leave the MDOsprey list, send e-mail to listserv@home.ease.lsoft.com with the following message in line 1: signoff mdosprey ======================================================================= =========================================================================