From south-bay-birds-bounces+south-bay-birds-archive=[[email protected]] Mon Sep 15 22:16:52 2003 Received: from www.plaidworks.com (localhost [127.0.0.1]) by plaidworks.com (8.12.9/8.12.9) with ESMTP id h8G5DrID027932 for <[[email protected]]>; Mon, 15 Sep 2003 22:13:53 -0700 (PDT) Received: from grouse.mail.pas.earthlink.net (grouse.mail.pas.earthlink.net [207.217.120.116]) by plaidworks.com (8.12.9/8.12.9) with ESMTP id h8G5CXZP027870 for <[[email protected]]>; Mon, 15 Sep 2003 22:12:33 -0700 (PDT) Received: from user-vcauree.dsl.mindspring.com ([216.175.109.206] helo=pavilion.earthlink.net) by grouse.mail.pas.earthlink.net with esmtp (Exim 3.33 #1) id 19z88c-00054D-00 for [[email protected]]; Mon, 15 Sep 2003 22:12:31 -0700 Message-Id: <[[email protected]]> X-Mailer: QUALCOMM Windows Eudora Version 5.2.1 Date: Mon, 15 Sep 2003 22:23:51 -0700 To: [[email protected]] From: Bill Bousman <[[email protected]]> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Subject: [SBB] Cooper's-Am. Kestrel Agonistic Encounter X-BeenThere: [[email protected]] X-Mailman-Version: 2.1.2+ Precedence: list List-Id: South Bay Birding List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: south-bay-birds-bounces+south-bay-birds-archive=[[email protected]] Errors-To: south-bay-birds-bounces+south-bay-birds-archive=[[email protected]] Folks: Interspecific encounters between predatory species can sometimes take on different flavors. Often we see raptorial species interacting in a fashion that is easily interpreted as territorial. That is, a smaller raptor will use its maneuverability to harass a larger raptor. Two interspecific pairs that come readily to mind are Peregrine Falcon vs. Red-tailed Hawk, and Red-tailed Hawk vs. Golden Eagle. But when the weight ratio is opposite, one wonders if it is a territorial encounter or more of "What's for dinner?" I've seen Cooper's Hawks try repeatedly to take a Burrowing Owl and in that circumstance, it seemed clear that it was a predator-prey relationship. This afternoon, cycling home, I saw a female Cooper's Hawk launch from a power pole after an (unsexed) Am. Kestrel. This was an amazing pursuit that lasted for 15 or 20 seconds and covered a large area. In the end, the pursuit appeared to slow (but not end); surely both were tired. The denouement was that the Cooper's landed on another nearby tower and the kestrel left the field. It appeared to me to be a serious encounter. Has anyone seen a Cooper's take another raptor as prey? Bill _______________________________________________ Do not post admin requests to the list. They will be ignored. south-bay-birds mailing list ([[email protected]]) Help/Unsubscribe/Update your Subscription: http://www.plaidworks.com/mailman/options/south-bay-birds/south-bay-birds-archive%40plaidworks.com This email sent to [[email protected]]