We investigated variations in the shape and size of some bones and their adaptive significances in both sexes of the migratory yellow breasted bunting (Emberiza aureola Pallas. 1773) and resident house sparrow (Passer domesticus Linnaeus. 1758) and tree sparrow (Passer montanus Linnaeus. 1758). https://allfixelectricales.shop/product-category/door-opener-assembly/