"Hagoromo" is a term for a type of budgerigar (parakeet) also known as a "helicopter" budgie, originating in Japan. They are show budgies characterized by a unique whorl of feathers on their backs, resembling a ruffled cape or a feathered kimono. This feather pattern is the inspiration for their name, "Hagoromo," which means "feathered robe" in Japanese.