Geographical Distribution 185 



these trees were widely distributed over North America, but 

 today they are restricted to our western coast, 10 and it may 

 be are doomed to extinction. 



Among the most characteristic, and withal attractive mem- 

 bers of California society are the humming birds, a group 

 occurring only in America. The several species found along 



A CALIFORNIA BIG TREE GROVE 

 Courtesy of the U. <S'. Bureau of Biological Survey. 



the Pacific Coast and the few occurring elsewhere are in- 

 vaders from the tropics where most of the more than four 

 hundred species find a home. Another interesting inhabitant 

 of southern California and Arizona is the great condor, 

 which spreads its wings from eight and a half to eleven feet. 

 Dwelling in the damp forests of Oregon and California 



10 Sequoia gigantea is limited to a few small areas in California, while 

 S. sempervirens or the "redwood" extends north along the coast into 

 Oregon. 



