Each winter, the search for food drives birds from the north woods into areas south of their summer range. This winter migration brings many new species within view of birders who eagerly search them out. One such species that makes this journey is the Common Redpoll. Common Redpolls are small, colorful finches that eat seeds and often show up at bird feeders.
While Common Redpolls can be scarce in certain years, another Redpoll species is even harder to find: The Hoary Redpoll. Hoary Redpolls look incredibly similar to Common Redpolls and they often flock together. In fact, they look so much alike that there has been talk about lumping them together into one species. For now, however, the two remain separate, and some key identification features can help to tell them apart.
While both birds have very small, triangular-shaped bills, the bill of the Common Redpoll is slightly larger. Hoary Redpolls will have a shorter bill than a Common Redpoll that will appear stubbier and more pushed in.
One of the most notable differences between the two species is the streaking on the chest. Common Redpolls have chest streaking that is more defined than in Hoary Redpolls. They also have bold streaking on the flanks, along with streaking on the rump and undertail coverts, which is either absent or subtle in Hoary Redpolls. Note the differences in the photos below with the heavy streaking on the Common Redpoll (Top Left and Top Right) vs. the Hoary Redpoll’s lack of streaking (Bottom Left and Bottom Right).
Crown and Chest
Another distinguishing characteristic of Redpolls are their red coloring on the crown and chest. Both Common and Hoary Redpolls display bright red crowns, however the Hoary Redpoll’s crown is smaller and primarily at the front of the head, whereas the Common’s crown will extend back further. Additionally, the male Common Redpolls will have more red on their chest compared to the male Hoary Redpoll, which may have only washed out red coloration on the chest, or almost no red.
All in all, the Common Redpoll has a body coloration ranging from tan to brown, compared to the “frosted” and muted browns seen in Hoary Redpolls. The red on the breast of the males is typically more apparent in Common Redpolls, as is the red on the crown. When compared with Common Redpolls, Hoary Redpolls sometimes look like they are in black and white other than their darker red crown.
With winter approaching, these birds will start to pop up in local parks and bird feeders. Finding a Hoary Redpoll in a flock of Commons can prove a difficult task to the untrained birder. Hopefully these ID tips can help you differentiate between the two species.
Haory Redpoll photos by Ryan Brady