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 20 of 35 for “"crows"”.
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Eavesdropping on speech in wild carrion crows
Large-billed crows wild-caught in Tokyo respond more to playback of Dutch than to Japanese without any prior training or rewards, but it remains unclear why they would respond differently to different languages. It is conceivable that they eavesdrop on human speech as an indicator to human presence …
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Wild American crows use funerals to learn about danger
University of Washington Abstract Wild American crows use funerals to learn about danger Kaeli Swift Chair of Supervisory Committee: Dr. John Marzluff School of Environmental and Forest Sciences While a growing number of animals demonstrate seemingly ritualistic behaviors around the death or body …
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Behavioral Differences Between Urban and Rural American Crows (Corvus brachyrhynchos)
… differences between urban and rural American crows (<em>Corvus brachyrhynchos</em>) by installing baited perches in urban and rural settings in Kittitas County, Washington. In order to observe differences in urban and rural crow behavior to approach or avoidance-oriented stimuli, perches …
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Decision-making, Inhibition and Planning in New Caledonian crows (Corvus moneduloides)
Over the last 25 years, New Caledonian crows have impressed scientists with their tool and problem solving behaviours. From manufacturing their own stick and hook tools in the wild, to solving metatool, water displacement, and a myriad other problems, this species has greatly contributed to the …
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Understanding predation of tortoises by nesting Pied Crows (Corvus albus) in western South Africa
… how widespread tortoise predation by Pied Crows was during the crow's breeding season. I aimed to quantify the proportion of Pied Crow pairs that provision tortoise to their chicks and the numbers being depredated, as well as the species of tortoises involved. During the 2016 breeding …
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Nico's bubbles : the story of a whale, some crows, and the search for sentience
… as researchers report that New Caledonian crows can use tools to solve rather complex problems; that dolphins and songbirds can identify themselves in mirrors; and that dogs can "turn off' survival drives in order to engage in play behavior. In fact, nonhuman animal intelligence research is …
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The vocalizations and syringeal anatomy of the common crow, Corvus brachyrhynchos
… was the primary objective of this research. Wild crows were tested with recordings of captive and wild crow vocalizations to determine the nature of the important calls and signals of this species. Common crows were also tested with "distress calls" of three sympatric species. The objectives of …
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Pied crow in South Africa: integrating ecological and social dimensions for effective management
… and economic impact. The impact of Pied Crows on wildlife and agriculture has become more evident, necessitating interventions from conservationists, farmers, scientists, and the public. A workshop conducted by BirdLife South Africa emphasized the urgency for research into diverse facets …
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What Dolphins Want: Animal Intentionality and Tool-Use
… the examination of tool-use among New Caledonian crows and Bottlenose dolphins. New Caledonian crows demonstrate advanced tool-manufacture and standardization, while Bottlenose dolphins use social learning to a much greater degree than other animals. These two case studies fit nicely with many of …
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Crow History 1700-1950: A Political and Social Battle to Retain their Culture
… utilized by the Crow is unique, and helped the Crows to preserve much of their Culture throughout the turbulent times of direct contact and assimilation. In this research I examine the movement of the Crows from eastern woodlands onto the Northern Plains, with an emphasis on the separation from …
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Sentinel behaviour and urban environments: A corvid’s perspective
American crows (Corvus brachyrhynchos) are the black-clad rulers of a city’s skies and can be spotted in most North American cities. The abundance of corvids has increased with increasing urbanization, suggesting they benefit from living near humans. Recent literature shows that urbanized species …
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The acoustic discrimination and recognition of individual heterospecifics by humans: proximate and ultimate causes
… contour, as well as individual large-billed crows by their calls. In Chapter 2, I focus on the functions associated with individual recognition through vocalizations and what fitness benefits this may entail, specifically in the context of reciprocal altruism between heterospecifics. A fourth …
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Influence of Predation on Least Tern and Piping Plover Productivity Along the Missouri River in South Dakota
… American kestrels (Falco sparyerius), American crows (Corvus brachyrhynchos), raccoons (Procyon lotor), great horned owls (lma.Q yirginianus), and mink (Mustela yison) were having a significant effect on the survival of piping plover and least tern nests and chicks in this region. American …
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The Impacts of Corvids on Biodiversity
… and rainfall change, with reporting rates. Pied crows are increasing in regions that are becoming hotter and a little wetter, which are predominantly areas in the west and the interior. There were simultaneous decreases of pied crows in the eastern regions of the country. Thus, change appears to …
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Vocal responses of Blue Jays (Cyanocitta cristata) to raptors that differ in predatory threat
… that two species in the corvid family, American Crows (Corvus brachyrhynchos) and Siberian Jays (Perisoreus infaustus), use referential calls to convey information about predator presence and level of threat. Because of their intelligence and flocking behavior, Blue Jays, like American Crows and …
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A multi-facetted approach to investigating theory of mind in corvids
… scrub-jays (Aphelocoma californica), and carrion crows (Corvus corone corone). Corvids have been reported to possess theory of mind-like abilities. This qualification reflects the fact that most research on theory of mind in these birds has revolved around the ability to respond to perceptual and …
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Creating Imaginary Worlds on the Page and in the Mind
… Daughter (2014), The Queen of all Crows (2018), and The Fugitive and the Vanishing Man (2020). The author, being himself unable to form mental images, but wishing to stimulate that reaction in his readers, explores possible similarities between visual perception and visual …
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Inference of phylogenetic relationships in passerine birds (Aves: Passeriformes) using new molecular markers
… suggest a closer relationship of these birds to crows, ravens, jays, and allies. For the third approach, I showed that CR1 sequences contain phylogenetic signal and investigated their applicability in more detail. In this context, I screened for CR1 elements in different passerine birds, used …
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“Beauty and the Beast” and the Representation of the Female: How Fairy Tales Reinforce and Influence Our Current Understanding of Gender Roles
… will focus on the YA fantasy duology, <em>Six of Crows</em>, by Leigh Bardugo. My research will examine the ways in which fairy tales, like “Beauty and the Beast,” have reinforced gender as a binary and how a subversion of these binary structures is crucial in expanding and improving our current …
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