ăcălanthis, ĭdis, f., = ἀκαλανθίς, i. q. acanthis,
a very small bird of a darkgreen color; according to Voss, the thistlefinch , goldfinch , Verg. G. 3, 338.
acalanthis idis, f , a small bird, the gold-finch, thistle-finch, V. ...
An Elementary Latin Dictionary