ABSTRACT The description of life-history traits is a prerequisite to understand the complex patterns of bird biodiversity. However, most of the highly diverse Neotropical avifauna still lack basic information on their reproductive behavior. Here, we describe the breeding biology of the Creamy-bellied Thrush (Turdus amaurochalinus) in a periurban area of southeast Brazil. We found 67 nests between early September and December in 2017 and 2018. Nests were 3.8 ± 1.9 m (mean ± SD) above ground, in native plants (43.3%), exotic plants (43.3%), and anthropogenic structures (13.4%). Clutch size was 2.9 ± 0.3 eggs, which were incubated exclusively by females during 75.6 ± 18.1% of the time. Both sexes reared the nestlings, but females performed more feeding trips and removed more fecal sacs than males. Incubation and nestling periods lasted, respectively, 13.0 ± 0.6 and 13.2 ± 1.5 days. Overall nesting success according to Mayfield method was 31.6%, and predation was the major cause of nest failure (52.8%). We concluded that this species had higher nest attentiveness, shorter nestling period, and higher nest survival compared to other Neotropical thrushes. The use of exotic plants and anthropogenic structures as nesting substrate may enhance the settlement of this migratory thrush in human-modified areas.

中文翻译：

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巴西东南部乳腹画眉（Turdus amaurochalinus）的繁殖生物学

摘要 生活史特征的描述是了解鸟类生物多样性复杂模式的先决条件。然而，大多数高度多样化的新热带鸟类仍然缺乏关于其繁殖行为的基本信息。在这里，我们描述了巴西东南部郊区的乳腹画眉（Turdus amaurochalinus）的繁殖生物学。我们在 2017 年和 2018 年的 9 月初和 12 月之间发现了 67 个巢穴。巢穴在地面以上 3.8 ± 1.9 m（平均值 ± SD）、本地植物（43.3%）、外来植物（43.3%）和人为结构（13.4%）中. 离合器大小为 2.9 ± 0.3 个卵，在 75.6 ± 18.1% 的时间内仅由雌性孵化。两性都饲养雏鸟，但雌性比雄性进行了更多的觅食旅行并去除了更多的粪囊。孵化期和雏鸟期分别持续，13.0 ± 0.6 和 13.2 ± 1.5 天。根据 Mayfield 方法，总体筑巢成功率为 31.6%，捕食是筑巢失败的主要原因 (52.8%)。我们得出的结论是，与其他新热带画眉相比，该物种具有更高的筑巢专注度、更短的筑巢期和更高的筑巢存活率。使用外来植物和人为结构作为筑巢基质可能会促进这种迁徙鹅口疮在人类改造地区的定居。