in different seasons; when and where are control methods Justified; 

 degree of control necessary on particular areas; methods of control, 

 with details on trapping, poisoning, or hunting methods; control 

 through improved manipulation of environment, as by altered cropping, 

 forestry, range management, without the use of poison or other forms 

 of killing; relation of manmals to public health, with data on 

 parasites or disease germs carried by them and other susceptible 

 animals (e.g., relation of rats and ground squirrels to bubonic 

 plague; of rodents to Rocky Ivlountain spotted fever, Bullis fever, 

 and typhus fever; of coyotes and other mammals to rabies; of rabbits, 

 coyotes, and others to tularemia)* 



DISCUSSION 



It is universally conceded that the work throughout, to be done well, must 

 be founded on a taxonomic basis; but the time has arrived when a new en^hasis 

 may be placed on the intensive study of the living animal in its natural environ- 

 ment. 



The outline presented in this leaflet indicates the richness of the field. 

 To do it justice, the work of many individuals and institutions throughout the 

 country will be required. On the tazonomic side, each State should have at 

 least one representative collection of the mammals and other vertebrates to be 

 found within its borders. The building up of private collections should likewise 

 be encouraged. There are still great gaps in the material representative of the 

 larger groups of mammals and of most of the smaller ones, even in the larger 

 collections in this country. 



But the incompleteness in our information regarding life histories and 

 interrelationships is even more conspicuous. Universities, colleges, normal and 

 high schools. State scientific surveys. National, State, and city museums, and 

 National and State associations and commissions for the protection of fish and 

 game, as well as the United States Departments of Agriculture and of the Interior, 

 all have an opportunity to serve their respective constituencies and the country 

 in this field. 5/ 



5/ Uie -i^'ish and Wildlife Seinrice, U. S. Department of the Interior, solicits 

 correspondence from any individual or institution planning work on the relation- 

 ship of life histories of mammals or birds, and will be glad to assist with 

 advice or suggestions as opportunity may be given. 



t 



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