Cover caption: Sclater’s monkey (Cercopithecus sclateri) from Akpugoeze (Enugu State), Nigeria. Sclater’s monkeys are endemic to southern Nigeria, and they are protected through informal institutions at Akpugoeze, which harbors the largest sacred population of the species across its narrow range. Photo: Lynne R. Baker

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封面说明：来自尼日利亚阿克普戈泽（埃努古州）的斯克莱特猴（Cercopithecus sclateri ）。斯克莱特猴是尼日利亚南部的特有物种，它们受到阿克普戈兹非正式机构的保护，阿克普戈兹在其狭窄的范围内拥有该物种最大的神圣种群。照片：林恩·R·贝克