Loxia curvirostra
A chunky finch with a crossed bill built for prising seeds from pine cones.
Size: 16.5 cm | Habitat: Park & Woodland-Edge Birds | Season: All year
Unmistakable at close range, the crossbill has a stout bill with tips that cross over, perfectly adapted for levering seeds out of conifer cones. Resident in pine forests, its numbers are boosted in some years by large-scale 'irruptions' of birds arriving from the continent.
Crossed bill tips, visible at close range · brick-red plumage (male) or green-yellow (female) · large head and short, forked tail · found in conifer plantations and pine forest
Crossbills feed almost exclusively on conifer seeds, using their unique bill to prise cone scales apart, and breed unusually early in the year, sometimes in midwinter, to make the most of the cone crop.
A crossbill's bill grows crossed at the tip specifically to lever open pine cone scales — chicks are born with straight bills that only cross as they mature.
The crossbill's population in Britain is unusually hard to pin down from year to year, because numbers are periodically swelled by large 'irruptions' of birds arriving from continental Europe when the conifer seed crop fails there. These influxes, sometimes involving thousands of birds crossing the North Sea in a single autumn, mean the resident breeding population can be topped up dramatically and unpredictably.
Its specialised bill, adapted purely for extracting seeds from between cone scales, means its fortunes are tied tightly to conifer forestry, and the extensive pine plantations of the Scottish Highlands, Breckland, and the New Forest now support healthy, stable numbers. That stability, plus a wide UK range and no significant decline, keeps it comfortably on the Green List.
🟢 Conservation status: Green (UK Birds of Conservation Concern 5)
Green-listed, reflecting a stable, wide-ranging population supported by extensive conifer forestry across Britain.
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