Red Crossbill

The Red Crossbill is instantly recognizable for its odd, crossed bill tips, an adaptation for extracting seeds from between the scales of conifer cones. Adult males are brick-red to orange-red overall with darker wings and tail, while females are dull olive-yellow to gray-green. Juveniles are heavily streaked brownish. The species is notoriously variable, with numerous distinct "call types" across North America that differ subtly in bill size, flight calls, and preferred conifer species, some of which may eventually be recognized as separate species.

Red Crossbills are nomadic wanderers, following unpredictable cone crops rather than holding fixed territories or migrating on a set schedule, and can breed at almost any time of year when a good cone crop is found.

Key Field Marks

• Distinctive crossed bill tip, visible at close range or with binoculars
• Males: brick-red to orange-red body, darker unmarked wings and tail
• Females: olive-yellow to grayish-olive with a yellowish rump
• No wing bars (key difference from White-winged Crossbill)
• Stocky build, short notched tail

Similar Species

• White-winged Crossbill: shows two bold white wing bars, which Red Crossbill lacks; White-winged males tend to be more pink than orange-red.
• Pine Grosbeak: much larger, with a straight (uncrossed) bill and white wing bars.
• House Finch/Purple Finch: lack the crossed bill and are more streaked, especially on the flanks.

Habitat

Red Crossbills inhabit coniferous forests of pine, spruce, fir, hemlock, and larch, tracking cone crops that vary year to year and region to region.

Range

This is one of the most widely distributed finches, found across boreal and montane conifer forests of North America, Europe, Asia, and parts of Central America and the Caribbean pine forests.

Migration

Rather than following a predictable migratory pattern, Red Crossbills are irruptive and nomadic, moving unpredictably in search of abundant cone crops and sometimes breeding far outside their typical range or season when food is plentiful.

Behavior

Flocks move erratically through conifer stands, often heard before seen as they call in flight. Their specialized bill lets them wedge cone scales apart and use the tongue to extract seeds efficiently.

Voice

Flight calls are sharp "kip-kip" or "jip-jip" notes, varying subtly among the different call types; the song is a varied series of warbles, trills, and chips given from a treetop perch.

Feeding

Conifer seeds make up the vast majority of the diet, supplemented occasionally with other seeds, buds, and small amounts of insects; crossbills are also known to visit mineral licks and roadside grit or salt.

Nesting

Breeding can occur nearly any month of the year when cone crops are abundant, even in the dead of winter. Nests are well-insulated cups of twigs, bark strips, and grass placed on a conifer branch, typically holding 3-4 eggs incubated by the female.