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Corvids in combat: with a weapon?(birds using tools)
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 ...
- Crows and Jays
- Encyclopedia entry from: The Gale Encyclopedia of Science January 1, 2008 700+ words
Crows and Jays General characteristics...members of the crow family (Corvidae...the ravens, crows, jays, magpies...s ground jay, which is...captive blue jay used a tool...other captive jays who watched...water. Hooded crows have been...hole. The crow will do ...
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- Newspaper article from: Contra Costa Times (Walnut Creek, CA) June 7, 2007 700+ words
...Livermore Dear J. B: Crows are magnificent opportunists...are a bit more than most crows are usually willing to...there at the top of the Crow Dinner Menu. Crows have powerful beaks and...because it helps to keep the jays and crows at bay. Thanks...
- BancBoston Robertson Stephens Upgrades Trammell Crow Company to a Buy Rating.
- Press release article from: PR Newswire November 23, 1998 700+ words
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- Newspaper article from: Chicago Tribune (via Knight-Ridder/Tribune News Service) August 5, 2002 700+ words
...America. An adult crow weighs about 20 ounces...the immune system of crows and attaching small...birds that includes crows, jays and magpies. Throughout...bad luck. But the crows' problem-solving...Aesop's fable "The Crow and the Pitcher...
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- Newspaper article from: Rocky Mountain News (Denver, CO) November 10, 2001 700+ words
...hosting a variety of crow-family birds - magpies, scrub jays, eastern blue jays, Steller's jays and a few crows. The interaction...the eastern blue jays seem lowest on...occasional Steller's jay. All the jays...the occasional crow Sir. Checking...
