w 
50 
THE WILSON JOURNAL OF ORNITHOLOGY • Vo/. 123, No. 1. March 2011 
□ SPRNCA 
- San Pedro River 
— Interstate highway 
= Highway 
- Local roads 
Cities (population size) 
o <10,000 
© 10000 - 40000 
O >40,000 
Upper San Pedro 
Watershed 
Kilometers 
K. Benedict 10/07 
' kj f an River showing bird sites ' highways, cities, boundary between upper and lower basins, and San Pedr 
Riparian National Conservation Area (SPRNCA). 
United States 
Mexico 
A Bird sites 
— Boundary between 
upper and lower 
basins 
