Albinism—the congenital absence of pigmentation—is a very rare phenomenon in animals due to the significant costs to fitness of this condition. Both humans and non-human individuals with albinism face a number of challenges, such as reduced vision, increased exposure to ultraviolet radiation, or compromised crypticity resulting in an elevated vulnerability to predation. However, while observations of social interactions involving individuals with albinism have been observed in wild non-primate animals, such interactions have not been described in detail in non-human primates (hereafter, primates). Here, we report, to our knowledge, the first sighting of an infant with albinism in wild chimpanzees (Pan troglodytes schweinfurthii), including social interactions between the infant, its mother, and group members. We also describe the subsequent killing of the infant by conspecifics as well as their behavior towards the corpse following the infanticide. Finally, we discuss our observations in relation to our understanding of chimpanzee behavior or attitudes towards individuals with very conspicuous appearances.

中文翻译：

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在野外首次观察到白化病黑猩猩：社会互动和随后的杀婴

白化病——先天性缺乏色素沉着——在动物中是一种非常罕见的现象，因为这种疾病的适应成本很高。患有白化病的人类和非人类个体都面临着许多挑战，例如视力下降、紫外线辐射暴露增加或隐秘性降低，从而导致更容易被捕食。然而，虽然在野生非灵长类动物中观察到涉及白化病个体的社会互动，但尚未在非人类灵长类动物（以下简称灵长类动物）中详细描述这种互动。在这里，据我们所知，我们报告了在野生黑猩猩（Pan troglodytes schweinfurthii ）中首次发现患有白化病的婴儿)，包括婴儿、其母亲和团体成员之间的社交互动。我们还描述了随后被同种动物杀死的婴儿以及他们在杀婴后对尸体的行为。最后，我们讨论了与我们对黑猩猩行为或对外表非常显眼的个体的态度的理解相关的观察。