The Chatham gerygone or Chatham Island warbler (Gerygone albofrontata) is a species of bird in the Acanthizidae family. It is endemic to the Chatham Islands and thus not found on the mainland, where it’s relative, the endemic grey warbler (Gerygone igata), is found. The Chatham Island warbler is larger and sports different plumage for the male, female and juvenile birds. Both warblers were discovered and named by G. R. Gray in 1845.