دمچه

Also known as turkey tail

thumb|right|Pigeon skeleton with "plowshare"-type pygostyle (number 17) thumb|right|Confuciusornis sanctus with "rod"-type pygostyle and the two central tail feathers Pygostyle (; from Ancient Greek [] 'tail, rump' and [] 'pillar, column') is a skeletal condition in which the final few caudal vertebrae are fused into a single ossification, supporting the tail feathers and musculature. In modern birds, the rectrices attach to these. The pygostyle is the main component of the uropygium, a structure colloquially known as the '''bishop's nose, parson's nose, pope's nose, or sultan's nose'''. This