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The thermal properties of some nests of the Eurasian Tree Sparrow Passer montanus |
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| Authors: | Jan Pinowski Andrzej Haman Leszek Jerzak Barbara Pinowska Mi?os?awa Barkowska Andrzej Grodzki Krzysztof Haman |
| Institution: | 1. Center of Ecological Research, Polish Academy of Sciences, Dziekanów Le?ny, PL 05 092 ?omianki, Poland;2. Trojdena 11m 104, PL 02 109 Warszawa, Poland;3. Institute of Biotechnology and Environment Protection, University of Zielona Góra, Monte Cassino 21b, PL 65 562 Zielona Góra, Poland;4. Department of Ecology, Institute of Zoology, Warsaw University, Banacha 2, PL 02 097 Warszawa, Poland;5. Laboratory of Electronics, Faculty of Physics, Warsaw University, Pasteura 7, PL 02 093 Warszawa, Poland;6. Institute of Geophysics, Warsaw University, Pasteura 7, PL 02 093 Warszawa, Poland |
| Abstract: | 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. |
| Keywords: | Nest Thermal properties Experiment with artificial simulation Winter Passer montanus Eurasian Tree Sparrow |
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