Re: [cobirds] Boulder raven antics

Hi All,

Anyone interested in Raven and other corvid behaviors should read Gifts of the Crow by John Marzluff and Tony Angell. Apparently Ravens teaming up to drive other birds into windows etc. is not uncommon. The research being done with these birds is very revealing and quite interesting.

Steve Larson 

Northglenn, CO

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From: "Norm Lewis" <migrant44@aol.com>
To: elena@indra.com, cobirds@googlegroups.com
Sent: Friday, December 28, 2012 10:55:58 PM
Subject: Re: [cobirds] Boulder raven antics


I would not have mentioned this, but I thought it would make an interesting piggy-back on Elena's comments.  Ted Cooper and I did a trip yesterday that started at Red Rocks, and wound its way from Baseline to Legion Park, on to Cottonwood Marsh and 75th Street, over to the "cardinal site", up to Allenspark, back through Ward and finally ending at Valmont for a very interesting "gull hour" with Ted Floyd.  We saw lots of great birds along the way, but nothing worthy of posting that hadn't been previously mentioned by Mike Henwood and Ted.  However, as we were driving up to the cardinal locality, we were stopped at an intersection when we saw a pigeon behaving strangely; it was flying into a corner formed by the intersection of two buildings and seemed to be in a total panic.  The source of the pigeon's distress quickly became apparent.  Two ravens were pursuing the bird into the corner with obvious evil intent.  They harrassed it into a collision with a door and through several (for a pigeon) fairly impressive aerial maneuvers. The pigeon ultimately escaped, and I commented that I had never seen ravens acting like raptors.  They did not have the skills to bring down the pigeon, but it was not for lack of trying.

Norm

Norm Lewis
migrant44@aol.com



-----Original Message-----
From: elena <elena@indra.com>
To: cobirds Colorado Field Ornithoogists <cobirds@googlegroups.com>
Sent: Fri, Dec 28, 2012 9:45 pm
Subject: [cobirds] Boulder raven antics


Yesterday at the 29th Street Mall in Boulder, a pair of common ravens was
perched in the roof trusses of the roof over the parking garage.  Their
vocalizations were tremendously amplified, resonating through the garage and the
walkway.   They weren't feeding on anything, just sitting and calling.  We
traded a number of resonant "quorks" and I would have stayed to see what they
were going to do but had an appointment at the Apple store. Then today at 1 pm a
raven chased a red tailed hawk over Valmont and 28th street, both zigzagging
pretty low over the traffic.  


Elena Holly Klaver,  Niwot

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