ZOOLOGICAL SOCIETY BULLETIN. 



753 







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I 



COLONIZING THE PURPLE MARTIN. 

 Several houses — each containing twenty-six compartments — have 

 been placed in different localities in the Park to encourage 

 the martin to breed here. The colonizing of the martin has 

 been successfully accomplished in Plainfield, N. J., where for 

 thirty-five or forty years generations of them have bred in 

 little houses erected on the main street. 



with the approach of the winter of 1910-11, the 

 male alone was left in the experimental com- 

 partment, the female being warmly housed, ac- 

 cording to previous custom. 



In some cases, as with toucans which were 

 wintered out of doors in the Zoological Gardens 

 of London, it has been found that birds will 

 endure the cold season with apparent ease, but 

 succumb to the drain on their vitality occasioned 



by the moult of the following fall. It was not 

 so with the male ostrich. At the end of his sec- 

 ond winter in the open, his store of health and 

 vitality is unimpaired and the quality of his 

 plumage is exceptionally fine. 



It is planned to increase the outdoor facilities 

 another year, and presently to extend the scope 

 of experiment to other struthious birds. L. S. C. 



PACIFIC WALRUS TUSKS. 



These tusks are the world's first record for length. 



Gift of Henry A. Caesar. 



