Purple Finch vs Cassin's Finch

In short

Purple Finch and Cassin's Finch are similar in appearance but differ in structure and habitat preferences. Bill shape and coloration are key differentiators, with Purple Finch having a more conical bill and a raspberry-red wash, while Cassin's Finch has a straighter bill and a brighter red crown. Habitat can also be a clue, as Cassin's Finch prefers higher elevations.

Identification tips

• Bill shape: Purple Finch has a more conical bill, while Cassin's Finch has a straighter bill.
• Coloration: Male Purple Finches have a raspberry-red wash; male Cassin's Finches have a brighter red crown.
• Habitat: Look for Cassin's Finch in higher elevations and Purple Finch in mixed forests or suburban areas.
• Vocalization: Listen for Cassin's Finch's complex, mimicry-filled song versus Purple Finch's simpler melody.

Size

Both species are similar in size, but Cassin's Finch may appear slightly bulkier.

Plumage

Male Purple Finches have a raspberry-red wash over the head and body, while male Cassin's Finches have a more defined red crown and paler underparts. Female Purple Finches are heavily streaked with a more brownish tone, whereas female Cassin's Finches have finer streaks and a more contrasting facial pattern.

Behaviour

Cassin's Finches often forage in flocks and are known for their mimicry, sometimes imitating other bird species. Purple Finches are less likely to mimic and may be seen at feeders more frequently.

Habitat

Purple Finches are found in mixed forests and suburban areas, while Cassin's Finches prefer higher elevations in mountainous regions, particularly in the western United States.

Voice

Cassin's Finch has a more complex, warbling song with mimicry elements, whereas Purple Finch has a simpler, more melodic song.