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首页> 外文期刊>Journal of Field Ornithology >Breeding patterns and habitat use in the endemic Curl-crested Jay of central Brazil
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Breeding patterns and habitat use in the endemic Curl-crested Jay of central Brazil

机译：巴西中部特有的卷曲卷曲杰伊的繁殖模式和栖息地使用

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摘要

Little is known about the life history and reproduction of the Curl-crested Jay (Cyanocorax cris-tatellus), despite its conspicuousness and endemic status, being restricted primarily to the central Cerrado biome of Brazil. From May 1999 to December 2000, we examined the sizes of home ranges and foraging and reproductive patterns in this species. Average group size was approximately 10 individuals, with average home ranges of 172 ha; during the reproductive period individuals in the group tended to stay within approximately 29 ha of active nests. These jays are dietary generalists, while the diversity of substrates and capture techniques employed showed high flexibility in resource utilization. The reproductive period was from September to March, and groups produced average clutch sizes of 5.7 eggs, but only 35% of these hatched and only 25% of the nests produced at least one fledgling. Predation was the chief cause of nesting failure, accounting for 63% of nest loss. The occurrence of large groups year-round with several individuals providing parental care and evidence of just one female laying eggs suggest that the Curl-crested Jay is a cooperative breeder with a high degree of sociality. However, further study is necessary to exclude the possibility that more than one female is laying eggs in a single nest.
机译：尽管卷毛冠毛周杰伦（Cyanocorax cris-tatellus）的生活史和繁殖方式鲜为人知和流行，但对巴西的塞拉多中央生物群系却知之甚少，对此鲜为人知。从1999年5月到2000年12月，我们研究了该物种的家园范围，觅食和生殖方式。平均小组人数约为10个人，平均住所范围为172公顷；在繁殖期间，该组个体倾向于留在约29公顷的活动巢内。这些松鸦是饮食综合主义者，而所使用的底物和捕获技术的多样性显示了资源利用的高度灵活性。繁殖期是从9月到3月，各组的平均离合大小为5.7个卵，但其中只有35％的孵化了，只有25％的巢产生了至少一个雏鸟。掠食是筑巢失败的主要原因，占筑巢损失的63％。一年四季都有大批团体发生，有几个人提供父母照料，而且只有一个雌性产卵的证据表明，卷毛冠毛的周杰伦是一个具有高度社交性的合作育种者。但是，有必要进行进一步的研究，以排除一个以上的雌性在单个巢中产卵的可能性。

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