The correct spelling of the bird species known as the "Dun bird" is actually "Dunnock" (IPA: /ˈdʌnək/). The word derives from the Middle English term "dunnocke," meaning a small brown bird. The word's spelling reflects the pronunciation of the word, with the double "n" indicating a short "u" sound and the "ck" indicating a hard "k" sound. Dunnocks are typically found in Europe and Asia and are known for their shy and secretive nature, making them difficult to spot in the wild.