Graph depicting mean size and range for tibio tarsi of all Macaw species. Data from Olson, Storrs L.; Edgar J. Máiz López (2008). Caribbean Journal of Science 44 (2): 215–222. <a rel="nofollow" class="external free" href="http://caribjsci.org/July08/44_215-222.pdf">http://caribjsci.org/July08/44_215-222.pdf</a>.
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