Van Grouw, H2017-06-192017-06-192017-032017-06-15van Grouw, Hein. 2017, The dark side of birds: melanism—facts and fiction. Bull. B.O.C. 2017 137(1) p.12-36.0007-159510.25226/bboc.v137i1.2017.a9http://hdl.handle.net/10141/622223openAccessThe dark side of birds: melanism—facts and fictionJournal Article2513-9894Bulletin of the British Ornithologists' Club137112 - 36Melanismmelanocortin 1 receptormutationsColour aberrationsPlumage colouration