Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
fringilla (also frigilla and frin-guilla), ae, f.,a small bird, perh. the robin redbreast,Motacilla rubecula, Linn.; acc. to others, the chaffinch,Fringillacoelebs, Linn.; Varr. L. L. 7, § 104;Mart. 9, 55, 7; Paul. exFest. p. 90 Müll.