American goldfinch (Carduelis tristis).
American goldfinches have not graced my feeders since January 14 when 1 stopped by for a brief time. Birds of New Jersey says they are partial migrators, traveling in small flocks of 20 or so. They will move far enough south in winter to find food. Only a few stay all winter in New Jersey.
Although male goldfinches are bright yellow in summer, they look similar to females in the winter. Males have a black patch on the forehead in all seasons. Females do not.
It must be a sign of spring that 3 stopped by as opposed to the 1 who came in January.