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http://en.wikipedia.org/wiki/Streptoprocne_rutila.
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https://avibase.bsc-eoc.org/species.jsp?lang=EN&avibaseid=50222B1F0367C7EA&sec=lifehistory.
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Kooijman, S. (2010).
Dynamic Energy Budget theory for metabolic organisation.
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Marín, M. and Stiles, F. G. (1992).
On the biology of five species of swifts (Apodidae,
Cypseloidinae) in {Cost} Rica.
Proceedings of the Western Foundation of Vertebrate Zoology,
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Prinzinger, R., A.Preßmar, and Schleucher, E. (1991).
Body temperature in birds.
Comp. Biochem. Physiol., 99A(4):499--506. doi:10.1016/0300-9629(91)90122-S.