Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. būbo, ōnis, m. (f. only once Verg. A. 4, 462; cf. Serv. ad loc.; Non. p. 194, 1.
Hence given erroneously by Prisc. p. 683 P. and Rhemn. Palaem. p. 1370 fin. ib. as comm.) [βύας, βῦζα], an owl, the horned owl: Strix bubo, Linn., whose cry was considered as ill-boding, Plin. 10, 12, 16, § 34; Verg. A. 4, 462: ignavus bubo, Ov. M. 5, 550: profanus, id. ib. 6, 432 (cf. id. ib. 5, 543: profana avis): funereus, id. ib. 10, 453: Stygius (since Ascalaphus, son of Acheron or Styx, was changed to an owl; v. Ascalaphus), id. ib. 15, 791: rauci, id. Am. 1, 12, 19: bubone sinistro, Luc. 5, 396: trepidus, id. 6, 689: moestus, Sen. Med. 734: luctifer, id. Herc. Fur. 687: infaustus, Claud. in Eutr. 2, 407.