43, my favorites being Nicobar Pigeon (Halmahera) and Sombre Pigeon (Sulawesi).
1. Slender-billed Cuckoo-Dove - Sulawesi, Halmahera, Sangihe
2. White-faced Cuckoo-Dove - Sulawesi
3. Emerald Dove - Sangihe
4. Stephan's Dove - Sulawesi
5. West Peruvian Dove - Peru
6. White-winged Dove - USA
7. Eared Dove- Peru, Ecuador
8. Mourning Dove - USA
9. Common Ground-Dove - USA
10. Ruddy Ground-Dove - Panama, Peru, Ecuador
11. Croaking Ground-Dove - Peru
12. Bare-faced Ground-Dove - Peru
13. Black-winged Ground-Dove - Peru
14. White-tipped Dove - Panama
15. Gray-fronted Dove - Peru
16. White-throated Quail-Dove - Ecuador
17. Nicobar Pigeon - Halmahera
18. Pink-necked Pigeon - Sulawesi
19. Gray-cheeked Pigeon - Sulawesi
20. Red-eared Fruit-Dove - Sulawesi
21. Maroon-chinned Fruit-Dove - Sulawesi
22. Scarlet-breasted Fruit-Dove - Halmahera
23. Superb Fruit-Dove - Sulawesi, Halmahera
24. Blue-capped Fruit-Dove - Halmahera
25. Gray-headed Fruit-Dove - Halmahera
26. Black-naped Fruit-Dove - Sulawesi
27. White-bellied Imperial-Pigeon - Sulawesi
28. Gray-headed Imperial-Pigeon - Sulawesi
29. Green Imperial-Pigeon - Sulawesi
30. Spectacled Imperial-Pigeon - Halmahera
31. Elegant Imperial-Pigeon - Sangihe
32. Cinnamon-bellied Imperial-Pigeon - Halmahera
33. Pied Imperial-Pigeon - Halmahera
34. Silver-tipped Imperial-Pigeon - Sulwaesi
35. Sombre Pigeon - Sulawesi
36. Rock Pigeon - everywhere
37. Common Wood-Pigeon - Germany
38. Pale-vented Pigeon - Panama, Peru, Ecuador
39. Scaled Pigeon - Ecuador
40. Spot-winged Pigeon - Peru
41. Band-tailed Pigeon - USA, Panama, Peru, Ecuador
42. Plumbeous Pigeon - Peru, Ecuador
43. Ruddy Pigeon - Peru, Ecuador