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Diet composition of the scops owl (Otus scops) in central Romania

机译：在罗马尼亚中部的红角owl（Otus scops）的饮食组成

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摘要

Insect diversity correlates negatively with increasing management intensity of grasslands and with latitude. We supposed that similar patterns might be found in the diet spectra of insectivorous birds. The diet composition of the insectivorous scops owl was studied by analysing the prey remnants collected from 21 nests during 2008-2009 in an extensively cultivated rural area in the centre of the owla€?s distribution range in Central Romania. Altogether 831 prey items belonging to 45 prey taxa were identified. Similarly to the other parts of the scops owl range, orthopterans were high dominant prey items (86.8%) - especially bush-crickets Tettigoniidae (78.6%). In food samles were found also beetles (Coleoptera, 5.7%) and rarely spiders Araneidea, moths Lepidoptera, mantids Mantodea, Hymenoptera and Neuroptera (1 .5%). Vertebrates were rarely represented by rodents (2.5%) and passerines (1 .3%). The following diagnostic prey species were identified in 20 nests using the MDFM method: bush-crickets Tettigonia viridissima, Decticus verrucivorus, Metrioptera bicolor and other species of the family Tettigoniidae, the beetle Onthophagus spp., the cricket Gryllus campestris and other unidentified beetles Coleoptera g. sp. Furthermore, the scops owla€?s diet in different parts of its range was compared. As expected, there were more Orthoptera and generally more prey taxa in food in the range centre than at its northern limit.
机译：昆虫多样性与草地管理强度的增加和纬度呈负相关。我们认为在食虫鸟的饮食光谱中可能会发现类似的模式。通过分析罗马尼亚中部猫头鹰分布范围中心的一个广泛耕种的农村地区，在2008-2009年期间从21个巢中收集的猎物残留物，研究了食虫的饮食结构。共确定了831个属于45个猎物类群的猎物。与红角范围的其他部分相似，直翅目动物是占主导地位的猎物（86.8％），特别是丛林-T（Tettigoniidae）（78.6％）。在食品中也发现了甲虫（鞘翅目，5.7％），很少有蜘蛛蛛形纲，蛾类鳞翅目，曼陀罗，膜翅目和膜翅目（<1.5％）。脊椎动物很少以啮齿动物（2.5％）和雀形目（1.3％）为代表。使用MDFM方法在20个巢中鉴定出以下诊断性猎物物种：-T，T，Dec，双色and和T属的其他物种，甲壳虫，板栗，ry和其他未鉴定的甲壳虫。 sp。此外，比较了红皮owl在其范围内不同部位的饮食。不出所料，山脉中心的食物中的直翅类和食肉类比北部的更多。

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