Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 3 of 3 for “"Perch selection"”.
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Loggerhead shrike (<i>lanius ludovicianus L</i>) foraging patch and perch selection
… prefer for foraging. Shrikes forage from a perch on prey that they see in the surrounding vegetation. When I mowed the vegetation on one side of selected perches, shrikes strongly preferred to forage on the mowed side even though prey biomass was far lower on this side. These results suggest …
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Perch Selection by Male Dragonflies (Odonata, Anisoptera) Related to Competitive Ability and Species Composition
… to food and females. Territorial males typically perch on emergent vegetation and chase rival males who intrude into their territories. This dissertation research examined the role of male size in perch height selection, position on the perch, and competitive ability. Four hypotheses were tested: …
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Use of Eastern South Dakota Shelterbelts By Nesting Birds of Prey
… American kestrel pellets. Observations on raptor perch selection and habitat utilization between species were also made.