American Goldfinch: The American goldfinch (Spinus tristis) is a small, bright yellow finch with a black cap, wings, and tail. Males are particularly vibrant during breeding season, while females are more dull yellow-brown. These social birds are found in weedy fields, meadows, and areas with thistle plants, on which they feed. They have a distinctive undulating flight pattern and make a vibrant “potato-chip” call.