Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. parra, ae, f., a bird of ill omen, the common or barn owl; acc. to others, the green woodpecker or the lapwing: picus et cornix ab laevā, corvus, parra ab dexterā consuadent, Plaut. As. 2, 1, 12 Fleck.: impios parrae recinentis omen Ducat, etc., Hor. C. 3, 27, 1 Orell.; cf. Plin. 18, 29, 69, § 292.