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Corvids in combat: with a weapon?(birds using tools)

The Wilson Journal of Ornithology

| March 01, 2007 | Balda, Russell P. | COPYRIGHT 2007 Wilson Ornithological Society. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

On 26 April 2004 at 0655 hrs MST I observed the following interaction at a bird feeding station in Flagstaff, Arizona at 2,000 m elevation. The feeding platform measured 1 x 1 m and was within 2.3 m of the window through which the observations were made. The roof overhang was 2.2 m. from the center of the platform and 2.7 m above it.

OBSERVATIONS

A solitary American Crow (Corvus brachyrhynchos) was on the platform eating seeds. A pair of Steller's Jays (Cyanocitta stelleri) flew into a mountain mahogany (Cercocarpus montanus) shrub that borders the platform. The platform was stocked daily with a variety of seeds commonly eaten by local birds. Steller's ...

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Source: HighBeam Research, Corvids in combat: with a weapon?(birds using tools)

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