大短趾云雀(Calandrella brachydactyla)的繁殖生态、帮手存在、栖息地利用和营养活动:在意大利亚得里亚海中部进行的五年研究

M. Pantalone, Si Bai
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摘要

大短趾云雀(Calandrella brachydactyla)是一种候鸟,被认为是需要保护的鸟类,但意大利对其繁殖生态学和栖息地利用的研究很少。在这项工作中,我们旨在研究法诺机场(意大利中部,马尔凯,佩萨罗-乌尔比诺省)的这两个组成部分。该研究涉及 2018-2022 年的繁殖季节,描述了该物种使用的筑巢栖息地,还提供了该物种取食植物的相关数据。我们推测,选择有围栏的区域对减少捕食非常重要,我们还强调了在第二窝雏鸟的觅食过程中存在年轻的帮手。此外,我们还观察到,在一些成年雄鸟的控制下,雏鸟形成了托儿所。这里证实了一种半殖民状态,即在迁徙前形成家庭外的群体。该研究区域是马切斯地区该物种的主要繁殖地,平均密度为每 10 公顷 1.5 对(最多 2.4 对),是意大利中部已知的最佳繁殖地之一。
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Breeding ecology, helpers presence, habitat use and trophic activity of the Greater Short-toed Lark Calandrella brachydactyla: five years of study in Central Adriatic Italy
The Greater Short-toed Lark Calandrella brachydactyla is a migrant bird, considered of conservation concern, but poorly studied in Italy about his breeding ecology and habitat use. In this work, we aimed to study both of these components in the airfield of Fano (Central Italy, Marches, Pesaro-Urbino province). The study, relating to the 2018-2022 reproductive seasons, describes the nesting habitat used by the species, providing also data about the plants on which the species feed on. We hypothsized the importance of the choice of fenced areas for the less predation and we highlighted the presences of young helpers in the feeding of the second brood. Furthermore, we observed the formation of crèches for the young fledglings, controlled by some adult males. It’s confirmed here a semi-colonial condition that leading to the formation of extra-family groups before migration. The study area turns out to be the main reproductive colony of the species in the Marches region, with an average density of 1.5 pairs per 10 ha (maximum 2.4), one of the best know in central Italy.
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