noun
rustic bunting
A bird species (Emberiza rustica). The name is usually written in kana.
冬になると、かしらだかが日本に渡ってくる。
In winter, rustic buntings migrate to Japan.
The name likely derives from 頭 (kashira, 'head') and 高 (daka, 'high'), referring to the bird's raised crest, but the exact origin is uncertain.