Within the genus Loxia, several species of crossbills exist. Here are the main regions where different crossbills are found:
1. Red Crossbill (Loxia curvirostra):
- Europe (Scandinavia, Russia, Alps, etc.)
- Parts of Asia (Siberia, Northern China, etc.)
- North America (Canada, parts of the US like Colorado, Wyoming, etc.)
2. Two-barred Crossbill (Loxia leucoptera):
- Northern/Eastern Europe (Scandinavia, Finland, Eastern Europe)
- Parts of Asia (Russia, Siberia)
- Northern Canada
3. Parrot Crossbill (Loxia pytyopsittacus):
- North America (Canada, parts of the US like the Rockies, the Sierra Nevada, etc.)
- Mexico
4. White-Winged Crossbill (Loxia bifasciata):
- North America (Canada, Alaska, parts of the US, particularly the Northwestern States)
5. Scottish Crossbill (Loxia scotica):
- Scottish Highlands (United Kingdom)
- Parts of Europe like Scandinavia, North and Eastern Europe
6. Eastern Two-barred Crossbill (Loxia sinesciuris):
- Eastern regions of Russia and Japan
It's worth noting that some crossbill species might have subspecies with varied distributions within these general regions. The exact ranges can vary over time due to migration patterns and adaptations to different habitats.