common
American Goldfinch
The lemon-yellow summer bird with the black cap — the thistle specialist with a bouncy flight song.
Core Biological & Field Specifications
ID marks
Bright yellow (M, breeding), black cap and wings, olive-drab winter
Size
4.5–5 in
Song
Bouncy "po-ta-to-chip" flight call
Feeder
Nyjer/thistle, hulled sunflower, tube feeders