ISABEL ISLAND, near the mouth of the Gulf of 

 California, is a natural marine bird sanctuary. 

 Hundreds of Socorro Sooty Terns are seen on 

 the nestmg ground above. 



GULL EGGS are spotted and slightly smaller 

 than a medium-sized egg of the domestic hen. 

 Numerous species of gulls search waters of the 

 eastern Pacific Ocean for food. 



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