UNITED STATES DEPARTMENT OF AGRICULTURE 
BUREAU OF BIOLOGICAL SURVEY 
WASHINGTON, D. C. 
ADDRESS REPLY TO 
CHIEF, BUREAU OF BIOLOGICAL SURVEY, 
AND REFER TO A'U^USl/ 1916* 
Br. Alex Wetzaore, 
1011 fonun Building, 
Caorflpaento , California. 
Dear Wetmore; 
Inclosed are copies of letters which I trust will be of use to 
you in planning your work. The data relating to bird damage in 
Klickitat County, Washington, is not very specific as to time the 
da m age occtirs. Probably you can obtain more exact information on this 
point by \Yriting to Hans Beck, Goodnoe Hills, V/ashington. 
You of course understand that the relations of wild ducks to 
rice in California is your most important piece of work. Close atten- 
tion should be given to this at regular and short intervals so that no 
complaint that, it has been sli^ted can possibly be brought. The pro- 
tection of fields by bombs seems a most promising method and I am en- 
closing letters about two fims which have the bombs for sale. The 
great effects of this method result from the dislike ducks have to be- 
ing disturbed at night. Testimony of hunters is unjnimous that shoot- 
ing at ni^t has a hundred fold greater effect in driving birds away 
than shooting by day. Hepeated disturbance at night makes them entire- 
ly forsake the locality. 
The aux shells requested are being sent by express to Haywards and 
mail will be sent in care of Garlough, as heretofore. Your Lake Jurford 
report Yias safely received and is being copied. When the time comes I 
shall request that it. be used as you wish. 
