Winter Finch Finding in Reno
/Purple Finches began showing up in the Reno area around the same time as I did, the winter of 2016. Since I have been living in Reno, the species has been on my radar. However, that has not always been the case for Nevada birders. Prior to 2016, there were fewer than 10 recorded sightings in the state, 7, to be exact. While they are still uncommon to rare in the area, they can usually be found by the careful observer searching the right places at the right times. Most of these places have crab apple trees, which appears to be a favorite food item. As far as we know, Purple Finches are a winter visitor. However, at the time of the Nevada Breeding Bird Atlas, the species was suspected to breed in the Carson Range. This has never been confirmed, and suspicions remain. With sightings as late as May and as early as September in Verdi, one must wonder….
But speculation aside, there are a few field marks to keep in mind. When seeking Purple Finches-- and they are incredibly beautiful, how could you not?!-- Beware identification pitfalls! We do have two other finch species in the area that can look remarkably similar…In this post I will talk about the identification of House, Cassin’s and Purple Finch.
The first step is determining if the bird you are looking at is male or female-type. The reason I say, “female-type”, is that young male House, Cassin’s, and Purple Finches AND adult females are brown and streaky, however adult males of these species have bright red aspects to their plumage.
Adult males are nice and easy to identify, we’ll start with House Finches. Their slimmer stature, smaller size, and relatively longer tail is often enough to give them away. However, their plumage is different as well; male House Finches are a bright, Crayola-red with obvious brown streaks on their flanks. Male Purple Finches are a deeper, more purpl-ey red than the others, and if they have streaking it is very faint. The distribution of red coloring is different as well. Cassin’s Finches show the boldest red on their forehead, usually an obvious contrasting red patch, and the rest of their plumage tends to be washed lighter red. Purple Finch are more evenly washed red, with deep purple-red hues throughout their face, throat, back, and breast.
If you are looking at a female-type bird, Purple Finches will likely stand out immediately as larger and bolder than the familiar House Finch; and if not, the face pattern and underpart streaking should give them away. House Finches have messy brown streaking underneath, typically showing fuzzy dark brown streaks on a lighter brown background. Purple Finches have bolder streaking on a whiter background, and Cassin’s Finch have even crisper thin brown streaks on a white background.
House Finches are slightly smaller, slimmer, and longer tailed than either Cassin’s or Purple Finch. Ruling out House Finch is the first step, then a closer look at a few key field marks should identify any female finch. Note the face patterns and streaking of these female finches:
Once you have ruled out House Finch, based on face pattern and underpart streaking, take a closer look at the eyes. More specifically, the feathers around the eyes: Cassin’s AND Purple Finch both have variably bold white stripes on their face, creating a pattern that outlines their brown cheek patches. However, Cassin’s Finches have broken white eye rings, creating thin eye-arcs, above and below their eyes and Purple Finches do not. Using this combination of field marks should identify any female finch in our area. If the eyes are not particularly visible, look at the breast streaking. the overall coloring of the bird is useful as well. Purple Finches have a greenish cast to their brown plumage, whereas Cassin’s Finches are usually a colder hue of brown. Beware of lighting when assessing these differences. Check out these eye arcs and face patterns on female Cassin’s and Purple Finch:
The final clue to consider when puzzling over streaky brown finches, is vocalizations. The post would not be complete without any mention of ear birding! Finch vocalizations are very diverse and impressive, with male Cassin’s and Purple Finch often including mimicry of other species in their songs. However, each species tends to give distinct calls in flight, just after taking off. These calls can sometimes be heard from perched birds as well. The links below go to the MaCaulay Library where you can listen to these recordings.
Happy Finch-finding!
-Ned