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Bibliography Note: |
Includes bibliographical references (page 5). |
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Summary, Etc. Note: |
Abstract: From 80 to 85 percent of about 250 black-billed magpies (Pica pica hudsonia) in an urban roost were killed with poultry pellets treated with 2 percent 4-aminopyridine, a chemical frightening agent. Before death, birds exhibited typical distress reactions, but other magpies were attracted rather than repelled, as expected, by this behavior. Bait was exposed in metal troughs for 1.5 hours on 4 successive evenings. Four months later a second population of about 280 birds using the same roost was reduced 75 percent with pellets treated with 1 percent DRC-1339 (3-chloro-p-toluidine hydrochloride), a lethal agent. One year later the population contained only 85 birds. Both chemicals were effective in reducing magpie numbers, but from the standpoint of hazards to mammals and number of treatments needed, DRC-1339 appears more suitable. |
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Other Forms: |
Also available via the World Wide Web. |
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Additional Physical Forms: |
Online version: Guarino, Joseph L. Magpie reduction in an urban roost. Washington, D.C. : U.S. Dept. of the Interior, Fish and Wildlife Service, Bureau of Sport Fisheries and Wildlife, [1967] (OCoLC)957140268 |
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Elect. Loc./Access: |
HathiTrust Digital Library, Full view http://catalog.hathitrust.org/api/volumes/oclc/16517314.html |
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Name Added Entry: |
Schafer, Edward W., joint author. |