White-winged Crossbill Identification Guide

Overview

The White-winged Crossbill (Loxia leucoptera) is an irruptive finch of the boreal and subarctic conifer forests of North America and Eurasia (where it is called Two-barred Crossbill). Like other crossbills, its uniquely crossed mandibles are specialized for prying seeds from conifer cones, and its movements are driven almost entirely by cone crop abundance rather than a fixed migration schedule.

Key Field Marks

• Size & shape: A medium-small finch with a notched tail, and a distinctively crossed bill tip visible at close range.
• Male plumage: Bright pink to raspberry-red overall, with black wings and tail.
• Female/immature plumage: Olive-yellow to grayish with streaking, and the same black wings.
• Wing bars: Two bold, broad white wing bars are the key mark separating this species from the plainer-winged Red Crossbill — visible at rest and in flight, and diagnostic even on streaky immatures.
• Bill: Thinner and more finely crossed than Red Crossbill's heavier bill, an adaptation for extracting seeds from the smaller, softer cones of spruce and tamarack rather than pine.
• Behavior: Highly social and nomadic, often in flocks, clambering parrot-like over cones, and frequently detected first by flight calls overhead.

Separating It From Similar Species

• Red Crossbill: The single most reliable difference is the wing bars — Red Crossbill lacks white wing bars (or shows at most faint, thin ones), while White-winged Crossbill shows two broad, bold white bars. Red Crossbill also has a proportionally heavier, more robust bill suited to pine cones.
• Pine Grosbeak: Much bulkier and larger with a stubby, uncrossed bill; male Pine Grosbeaks are also rosy-red but far bigger, with a shorter, thicker bill and different flight call.
• Common Redpoll: Smaller, streakier, with a small yellow-based bill (not crossed) and a red cap rather than overall pink/red body.

Where and When to Find One

White-winged Crossbills breed across the boreal spruce-fir and tamarack forests of Canada and Alaska, and locally in the northern United States. Because their food supply (conifer seed crops) varies year to year and place to place, they are irruptive: in years of poor cone crops in the core range, flocks push south into the northern and even central United States in fall and winter, sometimes in large numbers, while in good cone years they may stay put or wander unpredictably. They favor spruce, tamarack, and hemlock stands, often in the same areas as Red Crossbills but with some preference for spruce/tamarack over pine.

Voice

The flight call is a dry, rapid, chattering series of notes, often rendered as a rattling "chif-chif-chif" — distinct in cadence and tone from Red Crossbill's flight call once learned, though both require careful listening. The song is a varied, warbling series of trills and buzzy notes given from a treetop perch, often incorporating call-like elements.