Abstract The generic name Polyborus has been traditionally associated with the “Crested Caracaras”, but confusion over its correct application has led to it recent falling out of use. Polyborus is based on a description by Marcgrave accompanied by a poor illustration, but only 2 species have ever been seriously considered as the identity of this description Long-winged Harrier Circus buffoni and Southern Caracara Caracara plancus. The nomenclatural history of this name is discussed and the identity of Marcgrave's description is elucidated as Yellow-headed Caracara Milvago chimachima. The implications for nomenclature are discussed, and it is recommended that both Polyborus and the name Falco brasiliensis (also based on the same description) be suppressed.

中文翻译：

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正确应用属名 Polyborus Vieillot, 1816 (Aves: Falconidae)

摘要 属名 Polyborus 传统上与“Crested Caracaras”相关联，但对其正确应用的混淆导致它最近不再使用。Polyborus 是基于 Marcgrave 的描述，并附有一个糟糕的插图，但只有 2 个物种被认真认为是这种描述的身份：长翅鹞马戏团 buffoni 和南卡拉卡拉 Caracara plancus。讨论了这个名字的命名历史，并将 Marcgrave 描述的身份阐明为黄头卡拉卡拉米尔瓦戈 chimachima。讨论了命名法的含义，并建议取消 Polyborus 和 Falco brasiliensis 名称（也基于相同的描述）。