House Finch vs. Purple Finch vs. Cassin's Finch: The Red Finch Puzzle

A red-tinged finch at the feeder sets off one of birding's classic ID debates. Three species are in play across much of North America, and the females are even trickier than the males. Here's a clean way to work through them.

Male House Finch

The default red finch in most towns. Red is concentrated on the head, throat, and rump, while the belly and flanks stay brown and heavily streaked. The red can shade toward orange or yellow depending on diet. The bill is fairly small with a curved upper edge.

Male Purple Finch

Looks “dipped in raspberry juice” — the red wash spreads over the head, breast, back, and wings, with clean, mostly unstreaked sides. The head looks bigger and the bill is stouter and straighter than a House Finch's.

Male Cassin's Finch (western mountains)

Crisp and pale overall with a bright red cap that contrasts with a browner nape, fine streaking, and a long, straight, pointed bill. A peaked crown gives it a slightly surprised expression.

The females (where it gets hard)

• House Finch female: plain blurry-brown face with diffuse, muddy streaking below and no strong pattern.
• Purple Finch female: bold white eyebrow and dark cheek patch — a strongly marked face — with crisp streaks.
• Cassin's Finch female: crisp fine streaks, a thin pale eye-ring, and that long straight bill.

Let location and bill break the tie

Cassin's is a bird of western conifer mountains; if you're in the East, you're choosing between House and Purple. Bill shape and the extent of red (head-only vs. whole front) usually settle it. A Birder AI photo ID factors in your region automatically, which quietly eliminates the wrong third of the puzzle.