Unlike some finch species, the American goldfinch uses its feet extensively in feeding. The seeds are attractive to small finches such as American goldfinch. The American goldfinch is a small finch, long, with a wingspan of . The American goldfinch is a diurnal feeder. The name "carduelis" is the Latin word for the European goldfinch. The American goldfinch undergoes a molt in the spring and autumn. Birds such as the goldfinch feed on the seeds. The seeds are an important winter food resource for some birds, notably the European goldfinch. These birds are fairly small, being around the same size as the widespread American goldfinch. Cornflower seed is one of the favourite foods of the European goldfinch. The subspecies of the European goldfinch are divided into two major groups. The immature American goldfinch has a dull brown back, and the underside is pale yellow. The average European goldfinch is long with a wingspan of and a weight of . Fernet-Branca is mentioned in the Pulitzer Prize-winning novel, "The Goldfinch" by Donna Tartt. Grandma suggests to Abby and Marcella that they go see Mrs. Goldfinch.