Single songtypes: song dialects
- Song learning used to match neighborís song after juvenile settlement
- Result in song ëdialectsí-patchwork variation
- Matching neighbors song appears to be important for obtaining territories
- Does not preclude individual recognition
- Dialects more common in stable environments like the tropics
- Smaller dialects in sedentary populations of WCS
- Larger, looser dialects in migratory populations