Colleen T. O'Rourke

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BACKGROUND Different strategies to search and detect prey may place specific demands on sensory modalities. We studied visual field configuration, degree of eye movement, and orbit orientation in three diurnal raptors belonging to the Accipitridae and Falconidae families. METHODOLOGY/PRINCIPAL FINDINGS We used an ophthalmoscopic reflex technique and an(More)
Inter-specific differences in the configuration of avian visual fields and degree of eye/head movements have been associated with foraging and anti-predator behaviors. Our goal was to study visual fields, eye movements, and head movements in two species of corvids: American crow (Corvus brachyrhynchos) and Western scrub jay (Aphelocoma californica).(More)
BACKGROUND Relatively little is known about the degree of inter-specific variability in visual scanning strategies in species with laterally placed eyes (e.g., birds). This is relevant because many species detect prey while perching; therefore, head movement behavior may be an indicator of prey detection rate, a central parameter in foraging models. We(More)
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