We studied the population biology and natural history of the endangered Swallowtail butterfly, Euryades corethrus to establish parameters for its conservation. We used capture-mark-recapture techniques and observations to study demography, mobility, foraging strategies, and sexual behavior. We captured 588 males and 367 females. Daily captures varied from zero to 44 per sex; sex ratio was male-biased. Abundance estimates showed that the population peaked during early spring and summer. Survival probability related to age, while temperature negatively affected recapture probability. Wing size varied throughout the study similarly for males and females, and both sexes displayed similar mobility. The distribution of flowers along sampling transects was not homogenous; Aristolochia sessilifolia was the only host plant recorded. The number of butterfly captures was higher in meadows and shrublands when compared to swamplands. Both the presence of flowers and host plants increased the chances of capturing individuals. The results shown here are relevant to design conservation strategies for the species, suggesting that classic conservation strategies, aimed to maintain a single patch of habitat protecting a single population, may not be the best strategy for the E. corethrus.

中文翻译：

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草原蝴蝶 Euryades corethrus (Papilionidae: Tridini) 的种群生物学和自然历史，一种来自南美坎波斯的濒危物种

我们研究了濒临灭绝的燕尾蝶 Euryades corethrus 的种群生物学和自然历史，以确定其保护参数。我们使用捕获标记重新捕获技术和观察来研究人口统计学、流动性、觅食策略和性行为。我们捕获了 588 名男性和 367 名女性。每天捕获从 0 到 44 不等；性别比例偏向男性。丰富的估计表明，人口在早春和夏季达到顶峰。生存概率与年龄有关，而温度对重新捕获概率有负面影响。在整个研究中，雄性和雌性的翅膀大小变化相似，两性都表现出相似的活动性。沿采样断面的花分布不均匀；马兜铃是唯一记录到的寄主植物。与沼泽地相比，草地和灌木丛中捕获的蝴蝶数量更高。花卉和寄主植物的存在都增加了捕获个体的机会。此处显示的结果与该物种的设计保护策略相关，这表明旨在维持单一栖息地保护单个种群的经典保护策略可能不是 E. corethrus 的最佳策略。