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Numrering	Referens	Omslagsbild	Hitta
1.	Hedenström, Anders, et al. (författare) Body frontal area in passerine birds 2003 Ingår i: Journal of Avian Biology. - 0908-8857. ; 34:2, s. 159-162 Tidskriftsartikel (refereegranskat)abstract Projected body frontal area is used when estimating the parasite drag of bird flight. We investigated the relationship between projected frontal area and body mass among passerine birds, and compared it with an equation based on waterfowl and raptors, which is used as default procedure in a widespread software package for flight performance calculations. The allometric equation based on waterfowl/raptors underestimates the frontal area compared to the passerine equation presented here. Consequently, revising the actual frontal areas of small birds will concomitantly change the values of the parasite drag coefficient. We suggest that the new equation S-b = 0.0129m(B)(0.61) (m(2)) where m(B) is body mass (kg) should be used when a value of frontal area is needed for passerines.

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