The ligatures -æ- and -œ- in Vieillot's new avian names established in the Nouveau dictionnaire d'histoire naturelle vols. I-XXXVI (1816-1819)

We have examined nineteen new names that contain the ligatures - ae- and - œ- introduced by Vieillot in the Nouveau dictionnaire dʹhistoire naturelle, and compared them with three world checklists of birds. Our results show that six were correctly cited by the selected references, one was cited from another author's posterior work, twelve were miscited or misread by at least one selected reference, and that five of Vieillot's names are incorrect original spellings, here corrected.