Search for dissertations about: "Parrots"
Found 4 swedish dissertations containing the word Parrots.
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1. Spatial Vision in Birds: Anatomical investigation of spatial resolving power
Abstract : Avian eyes are big both in relative and absolute terms, thus the importance of vision to birds is obvious. Even though the general eye plan is rather conservative throughout the group, there is a great variation in visual capabilities. READ MORE
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2. Bird Vision: Spatial acuity and colour discrimination in bright and dim light
Abstract : Birds use vision to guide navigation, foraging and mate choice, and studies of the limitations in bird visual perception are most helpful for the understanding of bird ecology. Here, I present four studies of bird vision in bright and dim light. READ MORE
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3. Planning and inhibition in corvids
Abstract : Executive functions (EF) denote the host of top-down mental processes that mediate self-regulation to achieve a goal. Among other things, EF support cognitive flexibility by allowing inhibition of automatic responses in favour of obtaining future goals. READ MORE
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4. Comparative studies of cognitive abilities in the Paridae : Evidence from laboratory studies
Abstract : The Paridae (tits, titmice and chickadees) is a bird family consisting of both food hoarding and non-hoarding species. Many studies have been conducted on birds that are considered to be cognitively advanced, such as parrots and corvids, whereas much less is known about these small passerines. READ MORE