Bismarck crow explained

The Bismarck crow (Corvus insularis) is a species of crow found in the Bismarck Archipelago. It was considered by many authorities to be a subspecies of the Torresian crow (C. orru), but is now treated as a distinct species.^{[1] [2]}

Notes and References

1. Dutson . G. . Gregory . P. . Boles . W.. 2011 . Bismarck Crow Corvus (orru) insularis warrants species status . Bulletin of the British Ornithologists' Club . 131 . 3 . 204–206 .
2. Web site: Gill . Frank . Donsker . David . Crows, mudnesters & birds-of-paradise . World Bird List Version 6.1 . International Ornithologists' Union. 27 January 2016.