The thermal properties of some nests of the Eurasian Tree Sparrow Passer montanus
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- 作者：Jan Pinowski ; Andrzej Haman ; Leszek Jerzak ; Barbara Pinowska ; Mił ; osł ; awa Barkowska ; Andrzej Grodzki and Krzysztof Haman
- 关键词：Nest ; Thermal properties ; Experiment with artificial simulation ; Winter ; Passer montanus ; Eurasian Tree Sparrow
- 刊名：Journal of Thermal Biology
- 出版年：2006
- 出版时间：October 2006
- 年：2006
- 卷：31
- 期：7
- 页码：573-581
- 全文大小：181 K
文摘
Using an electronic apparatus simulating a bird roosting in a nest at night, we examined the insulating qualities of Eurasian Tree Sparrow (Passer montanus) nests built in nest boxes under winter conditions. Nests of different construction were compared with an empty box, and with roosting in open air. Energy savings in an empty box accounted for 18 % , in boxes with incomplete nests for 23 % and in boxes with complete nests up to 36 % . The insulating value of nests mostly depended on their completeness and the proportion of feathers in the lining.