Jonkheer[1] Bernard Aimé Léonard du Bus de Gisignies (21 June 1808 in Saint-Josse-ten-Noode – 6 July 1874 in Bad Ems) was a Dutch nobleman and later on a Belgian politician.
In 1835 he presented a manuscript to the Royal Academy of Belgium in which described the bird Leptorhynchus pectoralis (the banded stilt).
[2][3] De Gisignies became the first director of the Royal Belgian Institute of Natural Sciences in 1846.
He described several species of bird including Crithagra canicapilla, Peucedramus taeniatus, Discosura popelairii, and Spinus xanthogastrus.
The marriage was objected to by his father as Petronilla did not come from nobility and he refused to attend the wedding ceremony.