Immature Male Purple Finch

Mon, 13 Apr 2026 20:18:58 -0700

A Purple Finch sings on a branch, high on life.

Immature Male Purple Finch

A few days ago, I was walking into Stanley Park when a Purple Finch caught my ear, singing its heart out on a cherry blossom branch.

To my surprise, instead of being raspberry red like an adult male, this individual was brown and streaked like a female.
Was this the heretofore unobserved behaviour of a singing female PUFI*?

Turns out, we can find the answer if we look a bit closer.

Juvenile Purple Finch plumage is brown and streaky, so young males can be confused with being female.
Unlike White-Crowned Sparrow, which often moults into adultlike plumage within the first half of its second calendar year, Purple Finch lacks a prealternate (prebreeding) moult. This means that male PUFI are not adorned with their characteristic red plumage until the prebasic (postbreeding) moult in the summer, which will replace every feather.

We are not left entirely in the dark however. Purple Finches might not have a prealternate moult, but young birds have an inserted moult in their first year of life (the preformative moult), which replaces low-quality juvenile feathers. This moult is partial, including some to all median coverts and up to 10 greater coverts (Pyle 2022).

The boundary where replaced feathers meet old ones is called a moult limit, and is often helpful in ageing birds.

A FCF/SY (First Cycle Formative or Second Year) male Purple Finch. Moult limits indicated by arrows at median (blue) and greater coverts (red).

Above, the blue arrow points to the moult limit between the retained juvenile (left) and formative median coverts (right). The red arrow points to the moult limit between the two inner greater coverts and duller, retained feathers.

*Although females have been reported singing for brief periods, it is said to differ from the male's song (Wootton 2020).

PurpleFinch on Ethan Moon

Immature Male Purple Finch

Immature Male Purple Finch