Josef Graf von Seilern und Aspang (25 November 1883, Lešná Castle – 18 August 1939, Zlín) was an Austrian-Czech ornithologist and oologist. Seilern was primarily interested in the Neotropical avifauna. His collections are held by Moravské zemské muzeum.
Works Partial list Hellmayr, C.E., and J. von Seilern. 1912. Beiträge zur Ornithologie von Venezuela. Archiv für Naturgeschichte 78A: 34–166.
References Obituary [von C. E. Hellmayr] in: Ibis 4, 1940, 353–354 pdf Mlíkovský J. & Sutorová H., 2009: Type specimens of birds in the collections of the Moravian Museum, Brno, Czech Republic. Acta Musei Moraviae, Scientiae Biologicae 94: 117–125.pdf