Wintering Ground 

 Migratory Route 

 Band Recovery 

 Yellowstone Area 



Figure 27. Migration route and wintering grounds of California gulls banded in north- 

 western Wyoming. During fall migration, the birds proceed west from the breeding 

 grounds to the Pacific Ocean before turning south to wintering areas in California. A 

 more direct route across Nevada would entail a trip through relatively barren country 

 (After Diem and Condon 1967). 



