نتایج جستجو برای: hirundo rustica
تعداد نتایج: 594 فیلتر نتایج به سال:
--Tree Swallows (Tachycineta bicolor), Violet-green Swallows (T. thalassina) and Barn Swallows (ttirundo rustica) were observed sunbathing under conditions that produced apparent hyperthermia as evidenced by gaping, posture and timing of exposure. Sunbathing was observed only on days having air temperatures above 30 C, medium to high humidities and low wind velocities. Duration of sunning behav...
Flight kinematics of the barn swallow (Hirundo rustica) over a wide range of speeds in a wind tunnel
Pigmentation of body surface in animals can have multiple determinants and accomplish diverse functions. Eumelanin and pheomelanin are the main animal pigments, being responsible of yellow, brownish-red and black hues, and have partly common biosynthetic pathways. Many populations of vertebrates show individual variation in melanism, putatively with large heritable component. Genes responsible ...
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