Date of Award
Zoo and Conservation Science-BS
Biology & Earth Science
Anna Young, PhD
First Committee Member
Joan Esson, PhD
Second Committee Member
John Tansey, PhD
Poicephalus, parrot, morphology, color, taxonomy
Other Animal Sciences | Zoology
Though describing and delimiting species is one of the principle aspects of many disciplines within biology, there is often debate about which methods and concepts should be used to make such decisions. The Tobias criteria for quantitative species delimitation represent one attempt to create a standard method of delimiting species based on the morphological species concept. However, previous examples of using these criteria have not always been completely quantitative. This study uses quantitative morphological and color data of three Poicephalusparrots as a case study for the effectiveness of the Tobias criteria. The results show varying levels of support for and dissent against previous species decisions made regarding these parrots, and may provide support for rethinking these past delimitations as well as working towards multifaceted, quantitative decision-making for future species.
Connon, Eileen, "Morphological and Color Variation in Poicephalus Parrots" (2019). Undergraduate Honors Thesis Projects. 85.