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Index of Subjects ---790415396-1690301627-1360937438=:29486 Content-Type: text/plain; charset=us-ascii I wonder if the loons, mergansers, razorbills etc are not scoping the water but rather immersing their nares (nostrils) in order to initiate the "diving response" to allow efficient use of oxygen while diving as outlned in this article (http://www.ducks.org/conservation/waterfowl-biology/diving-ducks-into-the-deep/page2). Cormorants, Gannets etc (Order Pelecaniformes) do not have external nostrils and would have no need to dip their heads in water to ready themselves for diving. Just a guess. Nancy ________________________________ From: "iamclar@dal.ca" <iamclar@dal.ca> To: naturens@chebucto.ns.ca Sent: Thursday, February 14, 2013 9:31:51 AM Subject: [NatureNS] Razorbill inner St. Margarets Bay, HRM All: Paul Brodie phoned yesterday to report a Razorbill foraging off his house on Boutiliers Pt., inner St. Margarets Bay - first he's seen there in decades. Some recent pattern here? Paul queries why it is that loons, mergansers, and his Razorbill, all "scope" the water for prey before diving, but cororants don't. Good question. Cheers, Ian Ian McLaren ---790415396-1690301627-1360937438=:29486 Content-Type: text/html; charset=us-ascii <html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt">I wonder if the loons, mergansers, razorbills etc are not scoping the water but rather immersing their nares (nostrils) in order to initiate the "diving response" to allow efficient use of oxygen while diving as outlned in this article (http://www.ducks.org/conservation/waterfowl-biology/diving-ducks-into-the-deep/page2).<br><br>Cormorants, Gannets etc (Order Pelecaniformes) do not have external nostrils and would have no need to dip their heads in water to ready themselves for diving.<br><br>Just a guess.<br><br>Nancy<br><div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div dir="ltr"> <font face="Arial" size="2"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> "iamclar@dal.ca" <iamclar@dal.ca><br> <b><span style="font-weight: bold;">To:</span></b> naturens@chebucto.ns.ca <br> <b><span style="font-weight: bold;">Sent:</span></b> Thursday, February 14, 2013 9:31:51 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> [NatureNS] Razorbill inner St. Margarets Bay, HRM<br> </font> </div> <br>All:<br><br>Paul Brodie phoned yesterday to report a Razorbill foraging off his house on Boutiliers Pt., inner St. Margarets Bay - first he's seen there in decades. Some recent pattern here?<br><br>Paul queries why it is that loons, mergansers, and his Razorbill, all "scope" the water for prey before diving, but cororants don't. Good question.<br><br><br>Cheers, Ian<br><br>Ian McLaren<br><br><br><br> </div> </div> </div></body></html> ---790415396-1690301627-1360937438=:29486--
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