References : 



Gill, R. 1972. South San Francisco Bay breeding bird survey. California Dept. 



of Fish and Game. Wildlife Management Branch Administrative Report No. 72-6. 

 Grinnell , J . and A . H . Miller . 1944 . The distribution of the birds of California . 



Cooper Ornithological Club , Berkeley , California . 

 Hoffman, R. 1927. Birds of the Pacific States. Houghton Mifflin Company, Boston. 

 Leach, H. R. and L. O. Fisk . 1972. At the crossroads. California Dept. of 



Fish and Game. pp. 21-22. 

 Wilbur, S. Administrative reports, Bureau of Sport Fisheries and Wildlife. 



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