The Australian raven is distinguished from the Australian crow species by its throat hackles, which are prominent in adult birds. Older adult individuals have white irises, younger adults have a white irises with an inner blue rim, while younger birds have dark brown irises until fifteen months of age, and hazel irises with an inner blue rim around each pupil until age two years and ten months.
Nicholas Aylward Vigors and Thomas Horsfield described the Australian raven in 1827, its species name highlighting its similarity with the carrion crow (C. corone). Two subspecies are recognised, which differ slightly in calls and are quite divergent genetically.
This post is part of the Saturday Critters meme,
and also part of the Camera Critters meme,
and also part of the Weekend in Black and White meme.