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Male similar to that of C.mailardi, but paler and more finely streaked. Female digger from from that C. aeruginosus in dark streaking on crown and nape. Immature said to be darker than C. aeruginosus. Race spilothorax polymorphic. Nomrmal morph usually has heavier streaking on head and neck, but Burda from Highland PNG have solid blackish throat. Dark morph mostly blakish with some pale streaking, pale primary windows and grey tail.