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Otherwise birds were were very scarce both in the 
hills and out on the pampa. But 21 species of birds were 
collected at Uyuni,including the hills and the pampa, 
and four more observed. The pampa running north from 
Uyuni(including the famous "Salar de Uyuni") was 
all at some remote time a sea. Great masses of coral 
rock are everywhere along ±foa what was the shores and 
shallower portions of this sea. The old shore lines may be 
easily traced,old beaches and sand dunes,etc. 
