Anatomy of birds

A stylised dove skeleton. Key: 1. skull 2. cervical vertebrae 3. furcula 4. coracoid 5. uncinate processes of ribs 6. keel 7. patella 8. tarsometatarsus 9. digits 10. tibia (tibiotarsus) 11. fibula (tibiotarsus) 12. femur 13. ischium (innominate) 14. pubis (innominate) 15. illium (innominate) 16. caudal vertebrae 17. pygostyle 18. synsacrum 19. scapula 20. dorsal vertebrae 21. humerus 22. ulna 23. radius 24. carpus (carpometacarpus) 25. metacarpus (carpometacarpus) 26. digits 27. alula