Pronunciation: [pˈa͡ɪɡəstˌa͡ɪl] (IPA) 
The word "Pygostyle" is a term used in ornithology to describe the fused vertebrae at the base of a bird's tail. The correct spelling of this word is determined by its origin from the Greek language. The "pyg-" prefix means "buttocks" or "tail," while the "-style" suffix means "pillar." Therefore, the correct pronunciation of this word is /ˈpaɪɡə(ʊ)staɪl/, with emphasis on the first syllable and a silent "g" in the second.
Pygostyle is a term used in ornithology to describe a bony structure found at the end of the vertebral column in certain birds. It is also commonly referred to as the "terminal vertebra." The pygostyle serves as a support for tail feathers, helping to provide stability and control during flight and other locomotion.
The pygostyle is made up of several fused vertebrae, typically from four to ten, depending on the species of bird. The fusion of these vertebrae creates a solid and rigid structure that acts as an attachment site for the tail feathers. It is generally located in the posterior region of the bird's body and forms the final section of the backbone.
Due to its specific function in flight, the pygostyle varies in shape and size across different bird species. It can be broad and flat or more narrow and elongated, depending on the arrangement of tail feathers and the bird's flight patterns. In some cases, the pygostyle may also have additional modifications, such as spines or hooks, to further aid in tail feather support.
Overall, the pygostyle plays a crucial role in providing stability and control during flight, enabling birds to maneuver and glide effectively. Its unique structure and characteristics contribute to the remarkable diversity and adaptability observed within the avian world.
The word "Pygostyle" is derived from the combination of two Greek words, "pygē" and "stulos".
The first part, "pygē" (πυγή), translates to "rump" or "tail" in Greek.
The second part, "stulos" (στῦλος), means "pillar" or "column" in Greek.
Combining these two words, "pygostyle" refers to the specific skeletal structure found in birds, which is responsible for supporting the tail feathers.
