next message in archive
next message in thread
previous message in archive
previous message in thread
Index of Subjects
Index of Subjects This is a multi-part message in MIME format. --Boundary_(ID_4FGeOPv+xt3eavpFNeBlNQ) Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT Hi Brian and others, A few notes on fall and winter concentrations of Blue Jays and corvids. When I was living at Greenwich in the Valley and feeding birds, I would 'see' concentrations of one to two dozen Blue Jays. However, through a small banding study I did, I know that there were many more Blue Jays coming to the feeders over the course of the winter than I would have thought without the banding. It also showed that in spite of the abundant food source I had set out, at least some of the Blue Jays I was feeding were also ranging kilometres away to the Wolfville area to visit other feeders during that winter. Regarding Blue Jay migration at Brier Island, autumn flocks can be in the order of many hundreds or more at times. This is nothing compared to the numbers that occur at the winter roosts of American Crows. The 'traditional' roost, whose numbers are included in the Wolfville Christmas count, can be in excess of 20,000. All the best, Lance From: naturens-owner@chebucto.ns.ca [mailto:naturens-owner@chebucto.ns.ca] On Behalf Of Brian Bartlett Sent: January 6, 2007 6:43 PM To: naturens@chebucto.ns.ca Subject: [NatureNS] size ________________________________ of corvid flocks Here in West End Halifax I find it's common to see Blue Jays alone or in pairs, and even more often to hear them, but less common to see them in larger groups -- such as half a dozen close together I saw a few days ago, without binoculars so I couldn't tell if there was a mix of adults and juveniles. While I've had so little luck with backyard feeders that I've given up on them (having two outdoor cats is no help), I wonder if those with feeders are accustomed to seeing larger groups of Blue Jays. I've read that all members of the Corvid family gather at least in small groups, but I'm wondering how large groups of Blue Jays get. Surely nothing like mobs of Crows -- but how much larger than 1/2 dozen? Thanks for any observations. Brian --Boundary_(ID_4FGeOPv+xt3eavpFNeBlNQ) Content-type: text/html; charset=US-ASCII Content-transfer-encoding: 7BIT <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=us-ascii"> <META content="MSHTML 6.00.2800.1586" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV dir=ltr align=left><SPAN class=873262416-09012007><FONT face=Arial color=#0000ff size=2>Hi Brian and others,</FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=873262416-09012007><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV> <DIV dir=ltr align=left><SPAN class=873262416-09012007><FONT face=Arial color=#0000ff size=2>A few notes on fall and winter concentrations of Blue Jays and corvids. When I was living at Greenwich in the Valley and feeding birds, I would 'see' concentrations of one to two dozen Blue Jays. However, through a small banding study I did, I know that there were many more Blue Jays coming to the feeders over the course of the winter than I would have thought without the banding. It also showed that in spite of the abundant food source I had set out, at least some of the Blue Jays I was feeding were also ranging kilometres away to the Wolfville area to visit other feeders during that winter.</FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=873262416-09012007><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV> <DIV dir=ltr align=left><SPAN class=873262416-09012007><FONT face=Arial color=#0000ff size=2>Regarding Blue Jay migration at Brier Island, autumn flocks can be in the order of many hundreds or more at times. This is nothing compared to the numbers that occur at the winter roosts of American Crows. The 'traditional' roost, whose numbers are included in the Wolfville Christmas count, can be in excess of 20,000.</FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=873262416-09012007><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV> <DIV dir=ltr align=left><SPAN class=873262416-09012007><FONT face=Arial color=#0000ff size=2>All the best,</FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=873262416-09012007><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV> <DIV dir=ltr align=left><SPAN class=873262416-09012007><FONT face=Arial color=#0000ff size=2>Lance</FONT></SPAN></DIV><BR> <BLOCKQUOTE dir=ltr style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px"> <DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT face=Tahoma size=2><B>From:</B> naturens-owner@chebucto.ns.ca [mailto:naturens-owner@chebucto.ns.ca] <B>On Behalf Of </B>Brian Bartlett<BR><B>Sent:</B> January 6, 2007 6:43 PM<BR><B>To:</B> naturens@chebucto.ns.ca<BR><B>Subject:</B> [NatureNS] size <HR tabIndex=-1> <FONT face="Times New Roman" size=3> </FONT> of corvid flocks<BR></FONT><BR></DIV> <DIV></DIV> <DIV><FONT face=Arial size=2>Here in West End Halifax I find it's common to see Blue Jays alone or in pairs, and even more often to hear them, but less common to see them in larger groups -- such as half a dozen close together I saw a few days ago, without binoculars so I couldn't tell if there was a mix of adults and juveniles. While I've had so little luck with backyard feeders that I've given up on them (having two outdoor cats is no help), I wonder if those with feeders are accustomed to seeing larger groups of Blue Jays. I've read that all members of the Corvid family gather at least in small groups, but I'm wondering how large groups of Blue Jays get. Surely nothing like mobs of Crows -- but how much larger than 1/2 dozen?</FONT></DIV> <DIV><FONT face=Arial size=2>Thanks for any observations.</FONT></DIV> <DIV><FONT face=Arial size=2>Brian</FONT></DIV></BLOCKQUOTE></BODY></HTML> --Boundary_(ID_4FGeOPv+xt3eavpFNeBlNQ)--
next message in archive
next message in thread
previous message in archive
previous message in thread
Index of Subjects