Sexual selection and aerodynamic forces affecting structural properties of the flight feathers of birds are poorly understood. Here. we compared the structural features of the innermost primary wing feather (P1) and the sexually dimorphic outermost (Ta6) and monomorphic second outermost (Ta5) tail feathers of barn swallows (Hirundo rustica) from a Romanian population to investigate ho... https://thegreensjunglebeautyshops.shop/product-category/liquid-eyeliner/