Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. vultur (volt-), ŭris (ante-class. collat. form of the nom. sing. vultŭrus (volt-), Enn. ap. Charis. p. 120 P.; id. ap. Prisc. p. 683 ib.; and id. ap. Serv. Verg. A. 6, 597, or Ann. v. 141 Vahl.), m., a vulture.
2. Vultur (Volt-), ŭris, m., a mountain in Apulia, near Venusia, now Monle Vulture, Hor. C. 3, 4, 9; Luc. 9, 185.
Hence, Vulturnus (Volt-), a, um, adj., of or belonging to Vultur: ventus, a southeastby-one-third-south wind, Plin. 2, 47, 46, § 119; Sen. Q. N. 5, 16, 3; Col. 5, 5, 15; 11, 2, 65; Gell. 2, 22, 11; App. de Mundo, p. 63, 14.