By Charles J. Sharp - Own work, from Sharp Photography, sharpphotography.co.uk, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=67888708
Sources:
(*) https://en.wikipedia.org/wiki/Northern_black_korhaan(*) https://ebird.org/species/whqbus1
(*) https://search.macaulaylibrary.org/catalog?taxonCode=whqbus1