Abstract
Birds can solve many cognitive tasks that were previously only solved by primates, implying that their cognitive ability is far greater than expected. Here, we investigated the ability of blue-fronted amazon parrots in solving the pebble-and-seed and the multi-access-box paradigms, two ecologically relevant cognitive tasks varying in complexity and required skills to solve. We also investigated whether laterality, sex and housing conditions influenced problem-solving capacity. We tested 14 adults kept in captivity and 27 reintroduced adults. Here, we present evidence of laterality for the species, showing right-footed, left-footed and ambidextrous individuals. Left-footed animals were more successful than the right-footed animals in the pebble-and-seed test. There was no sex difference in the problem-solving capacity of the blue-fronted amazon parrots for both pebble-and-seed and multi-access-box paradigms. Eleven captive animals were successful in at least one of the four multiple-access-box possible solutions. Four reintroduced individuals were successful in at least one of the multiple-access-box possible solutions. Only two captive animals and one reintroduced animal succeeded to solve more than one of the four multiple-access-box solutions. The average success rate of the pebble-and-seed test was 88.16% ex situ and 86.58% in situ, with individual variation in test-solving ability. Our study shows that unlike laterality, sex was not determinant in blue-fronted amazon parrots’ problem-solving ability. The blue-fronted amazon parrots have the visual discrimination skills needed for the pebble-and-seed task solution, and the motor skills for beak–foot coordination and potentially understanding of complex spatial relationships required for the string-pulling task, the multi-access-box solution achieved by most of the animals. Our results increased the knowledge of the cognitive ability of parrots, a group which lacked extensive cognition data.
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Acknowledgements
We thank all staff at CETAS-TANGARA PE for logistical support during data collection. We also thank Professors Artur Maia, Rachel Lira and Wallace Junior for fruitful discussions and comments on an earlier version of this manuscript. We thank Rebecca Umeed for grammar revision, Karolina Medeiros for technical support (FACEPE—BFT01602.04/17) and Mr Benedicto Alves Godinho for helping to build up the multi-access-box. Lucas Godinho was funded by a scholarship from The Brazilian National Council for Scientific and Technological Development—CNPq (147010/2016–0). We thank the Coordination for the Improvement of Higher Education Personnel (CAPES) and the Programa de Pós-Graduação em Biologia Animal of the Universidade Federal de Pernambuco for further logistical support.
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All observations and experimentation conducted in this study was non-invasive and followed the ethical rules of animal treatment in behavioural research and teaching (Buchanan et al. 2012). The research presented here adheres to the Brazilian legislation (Law 11,794 of October 8, 2008, Decree 6899 of July 15, 2009) and to the norms issued by the National Council of Control of Animal Experimentation (CONCEA), having been approved by the Ethics Committee of Animal Use (CEUA) of the Federal University of Pernambuco (UFPE) (Process number 23076.006233/2017–94). The research was also approved by the managers of the Tangara Wildlife Rescue Centre in Pernambuco (CETAS-Tangara PE), an organisation belonging to the State Agency of the Environment of the State of Pernambuco (CPRH).
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Godinho, L., Marinho, Y. & Bezerra, B. Performance of blue-fronted amazon parrots (Amazona aestiva) when solving the pebbles-and-seeds and multi-access-box paradigms: ex situ and in situ experiments. Anim Cogn 23, 455–464 (2020). https://doi.org/10.1007/s10071-020-01347-6
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DOI: https://doi.org/10.1007/s10071-020-01347-6