Home, near and far.
This species is found throughout the boreal and coniferous forests of North America and Eurasia. Its presence is closely tied to the availability of conifer seeds.
Birds Heard
FIELD GUIDE
FIELD GUIDE
Finches, Euphonias, and Allies
Red Crossbill
Loxia curvirostra
The Red Crossbill is a fascinating finch of coniferous woodlands, easily identified by its unique bill, with mandibles that cross at the tips. This specialized bill allows it to efficiently extract seeds from conifer cones. These birds are highly nomadic, often appearing in new areas in search of abundant cone crops, and can breed at any time of year when food is plentiful.
Nomadic, conifer specialistMedium-sized finchDistinctive crossed billSeed and bud eater
- Length
- 14-17 cm
- Wingspan
- 26-29 cm
- Weight
- 24-54 g
Typical adult measurements.
Individuals and populations vary.
01 / The telltale details
You’ll know it
when you see it.
Start with shape and behavior. Then look for the smaller details.
- 01
Bill
The most distinctive feature is the crossed bill, where the upper and lower mandibles overlap. This adaptation is used for prying open conifer cones.
- 02
Male Plumage
Adult males are typically brick red to reddish-yellow, with dark brown flight feathers and a dark, notched tail.
- 03
Female Plumage
Adult females are generally dull yellow to greenish-yellow, or gray to olive, with dark wings and tail.
- 04
Juvenile Plumage
Immature birds are streaked brown overall, with a heavily streaked whitish chest and a brown-streaked back. Their bills become crossed shortly after fledging.
02 / A place in the world
Where life
takes it.
Red Crossbills primarily inhabit mature coniferous forests, including pine, spruce, hemlock, and Douglas-fir stands. They are seldom found away from conifers, but wandering flocks may appear in planted conifers in parks or suburban areas.
Stay a while. Or follow the season.
Red Crossbills are considered nomadic and do not undertake regular seasonal migrations. Their movements are driven by the unpredictable availability of conifer seeds, leading them to disperse widely in search of food.
03 / Listen a little closer
A voice
of its own.
Their calls are sharp and metallic, often described as a series of hard 'kip' notes. The song includes short clicks, buzzes, and whistles.
04 / The life behind the feathers
A day in its world.
On the menu.
Their diet consists mainly of conifer seeds, which they extract from cones. They will also consume tree buds, other seeds, berries, and occasionally insects, particularly aphids.
Crossbills use their unique bills like sideways pliers to bite between cone scales. They insert their slightly open bill under a cone scale and bite down, pushing the scales apart to expose the seed, which they then extract with their tongue.
A place to begin.
Females construct bulky, cup-shaped nests from conifer twigs, grasses, and lichen, often lined with feathers. Nests are typically placed on a horizontal branch, well out from the trunk, high in a conifer tree. They can breed opportunistically throughout the year when food is abundant.
The little routines.
Red Crossbills are primarily diurnal and are typically found in small, chattering flocks year-round. They often climb in conifers, using their bills to grasp branches and cones. Flocking may aid in assessing food quality and providing protection from predators.
One more reason to pay attention
A familiar face.
A few surprises.
Red Crossbills are so dependent on conifer seeds that they feed them to their young, allowing them to breed even in winter if cone crops are sufficient.
There are multiple 'types' of Red Crossbills, distinguished by their flight calls and bill morphology, with each type often specializing in seeds from particular conifer species.
The oldest recorded Red Crossbill lived to be at least 16 years old.
05 / An eye for the difference
Could it be
someone else?
Two-barred Crossbill
Loxia leucopteraThe White-winged Crossbill has two prominent white wingbars, which are absent on the Red Crossbill.
Scottish Crossbill
Loxia scoticaThe Scottish Crossbill is extremely similar and can be difficult to distinguish from the Red Crossbill; identification often relies on subtle differences in call notes and bill measurements.
Cassia Crossbill
Loxia sinesciurisThe Cassia Crossbill was formerly considered a type of Red Crossbill but is now recognized as a distinct species, primarily differentiated by its unique call notes and specialization on Lodgepole Pine in Idaho.
Behind these field notesResearch & references · 12 sources
AI-assisted species research. Prepared September 2026. Details can vary across regions and populations.