20-10-2020 SIERRA DE ESPUNA, MURCIA - RED CROSSBILL (FEMALE) (Loxia curvirostra)

The Red Crossbill, known as Loxia curvirostra, is a small passerine bird belonging to the finch family Fringillidae. This species exhibits a unique adaptation: its mandibles, which cross at the tips, are specialized for extracting seeds from conifer cones and other fruits. Adult males typically display vibrant red or orange plumage, while females are adorned in shades of green or yellow. However, there is considerable variation in both beak size and shape, as well as call types, across its range.

The Red Crossbill is readily identified by its distinctive crossed mandibles, a feature that sets it apart from most other bird species. However, it shares this characteristic with the similar Two-barred Crossbill. The Red Crossbill can be distinguished by its uniformly brownish-black wings, lacking the bright white wing bars present in the Two-barred Crossbill. While there are other closely related crossbills within its range, such as the Parrot, Scottish, and Cassia Crossbills, these are best identified by their calls, as visual differences are minimal.

Red Crossbills inhabit a variety of coniferous forests across North America and Eurasia, where they are closely associated with the availability of conifer seeds.

The Red Crossbill is a widespread species, breeding and residing in coniferous forests across North America and Eurasia. Its presence can be irregular, as it may appear in certain areas only in years when the cone crop is abundant.

This species is known for its nomadic and irruptive behavior, with movements closely tied to the availability of conifer seeds. Red Crossbills typically breed in late summer when conifer seeds mature but may breed at any time of year if a suitable cone crop is found. They are known to disperse widely in search of food, and their occurrence can be quite unpredictable. Some populations, such as the Newfoundland Crossbill, are resident and do not exhibit significant movements.

The Red Crossbill is primarily identified by its call, a single note "chip" that varies between the different types. These calls are frequently given and are key to distinguishing between the various populations.

Breeding occurs in coniferous forests, with timing closely linked to the maturation of conifer seeds. Red Crossbills may nest at any time of year if they find an area with an adequate cone crop.

26-9-2015 MONTE CORONA,VALENCIA - RED CROSSBILL (FEMALE) (Loxia curvirostra)

The red crossbill or common crossbill (Loxia curvirostra) is a small passerine bird in the finch family Fringillidae. Crossbills have distinctive mandibles, crossed at the tips, which enable them to extract seeds from conifer cones and other fruits.

Adults are often brightly coloured, with red or orange males and green or yellow females, but there is wide variation in beak size and shape, and call types, leading to different classifications of variants, some of which have been named as subspecies. The species is known as "red crossbill" in North America and "common crossbill" in Europe.

Crossbills are characterized by the mandibles crossing at their tips, which gives the group its English name. Using their crossed mandibles for leverage, crossbills are able to efficiently separate the scales of conifer cones and extract the seeds on which they feed. Adult males tend to be red or orange in colour, and females green or yellow, but there is much variation.