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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Progesterone determined in feces levels in female red-crowned cranes during the breeding period. Data are mean ± SEM (n = 3/group). Same letters above the bar indicate that they are not are significantly different (p > 0.05).