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dc.contributor.advisorMannan, R. Williamen_US
dc.contributor.authorDawson, James William, 1957-
dc.creatorDawson, James William, 1957-en_US
dc.date.accessioned2013-03-28T10:20:18Z
dc.date.available2013-03-28T10:20:18Z
dc.date.issued1988en_US
dc.identifier.urihttp://hdl.handle.net/10150/276864
dc.description.abstractI studied the social organization of the Harris' Hawk (Parabuteo unicintus) in Arizona, 1984-1986. Breeding groups ranged in size from 2-7 and averaged 3.8 hawks. Offspring fledged during previous nesting attempts accounted for 72% of immature helpers. Aggregations averaged 5.9 hawks and were composed primarily of individuals from 2 or 3 neighboring groups. I identified 2 affiliative behaviors and 5 aggressive behaviors that Harris' Hawks used during social interactions. Behaviors that constituted overt aggression were rare in groups, but occurred in aggregations during interactions between hawks from different groups. Groups defended only their nesting areas during nonbreeding periods but defended foraging and nesting areas during breeding. Groups formed aggregations only during nonbreeding periods in specific areas between territories. I observed a peak in aggregation formation about 2.5 weeks before nesting. Open water was used frequently by nesting Harris' Hawks for drinking and bathing. Water sources were not defended and were shared by >1 group.
dc.language.isoen_USen_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.subjectHarris's hawk -- Reproduction.en_US
dc.subjectHarris's hawk -- Behavior.en_US
dc.subjectHawks -- Behavior -- Arizona -- Pinal County.en_US
dc.titleThe cooperative breeding system of the Harris' Hawk in Arizonaen_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.identifier.oclc22157057en_US
thesis.degree.grantorUniversity of Arizonaen_US
thesis.degree.levelmastersen_US
dc.identifier.proquest1335676en_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineRenewable Natural Resourcesen_US
thesis.degree.nameM.S.en_US
dc.identifier.bibrecord.b17365090en_US
dc.identifier.bibrecord.b17365089en_US
refterms.dateFOA2018-04-26T03:11:01Z
html.description.abstractI studied the social organization of the Harris' Hawk (Parabuteo unicintus) in Arizona, 1984-1986. Breeding groups ranged in size from 2-7 and averaged 3.8 hawks. Offspring fledged during previous nesting attempts accounted for 72% of immature helpers. Aggregations averaged 5.9 hawks and were composed primarily of individuals from 2 or 3 neighboring groups. I identified 2 affiliative behaviors and 5 aggressive behaviors that Harris' Hawks used during social interactions. Behaviors that constituted overt aggression were rare in groups, but occurred in aggregations during interactions between hawks from different groups. Groups defended only their nesting areas during nonbreeding periods but defended foraging and nesting areas during breeding. Groups formed aggregations only during nonbreeding periods in specific areas between territories. I observed a peak in aggregation formation about 2.5 weeks before nesting. Open water was used frequently by nesting Harris' Hawks for drinking and bathing. Water sources were not defended and were shared by >1 group.


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