Finches (Fringillidae)

Scottish Crossbill (Loxia scotica) - HBW 15, p. 602

French: Bec-croisé d'Écosse German: Schottlandkreuzschnabel Spanish: Piquituerto Escocés

Taxonomy: Loxia curvirostra scotica E. J. O. Hartert, 1904, East Ross-shire, Scotland.
Forms a species group with L. curvirostra and L. pytyopsittacus, and all have sometimes been considered conspecific. Present species almost identical to L. curvirostra in wing, tail, bill and tarsus measurements, and overlaps in wing and bill measurements with L. pytyopsittacus; intermediate between those two species in bill shape (a feeding adaptation), and feeding behaviour (and excitement call) apparently sufficient partly to isolate it from L. curvirostra, no hybridization known in slight overlap in breeding ranges; recently found to hybridize wit.. View all taxonomy...

Taxonomy: Loxia curvirostra scotica E. J. O. Hartert, 1904, East Ross-shire, Scotland.
Forms a species group with L. curvirostra and L. pytyopsittacus, and all have sometimes been considered conspecific. Present species almost identical to L. curvirostra in wing, tail, bill and tarsus measurements, and overlaps in wing and bill measurements with L. pytyopsittacus; intermediate between those two species in bill shape (a feeding adaptation), and feeding behaviour (and excitement call) apparently sufficient partly to isolate it from L. curvirostra, no hybridization known in slight overlap in breeding ranges; recently found to hybridize with L. pytyopsittacus, and genetic evidence reveals limited differences between the three species in Europe, indicating that they are not in total reproductive isolation. Studies of breeding (of captive and wild populations) reveal assortative mating principally on basis of bill size and flight and excitement calls, but extent of hybridization not fully known and differences, although slight, are sufficient to restrict widespread interbreeding; further research required. Monotypic.

Distribution: N & NE Scotland.

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