190 Wisconsin Academij of Sciences^ Arts and Letters. 



and ten species. Eleven are residents throughout the year. 

 Eighteen are strays or very rare visitors. Eighty-seven are 

 summer residents, and ninety-four are through migrants. 

 Of the above residents and migrants, one-hundred species 

 have been known to breed in either Brown or Outagamie 

 counties. 



In the following table, I have attempted to compare the 

 arrival of our migratory birds, for the years 188;^ and 1883; 

 giving as data, the results of Mr. F. L. Grundtvigs's observa- 

 tions at Shiocton, and mine at West De Pere. 



Great value should especially be placed upon the observa- 

 tions of Mr. F. L. Grundtvig, while at Shiocton, for during 

 these observations, his whole time was constantly devoted 

 to the work. The collecting trips, usually made twice each 

 day, took him through varied places, on both land and 

 water. 



Each arrival was recorded after personal observation and 

 careful study. Few species escaped his notice, and no arrival 

 to my knowledge, was omitted from his daily record. 



Care should be exercised in using my notes with his^ 

 Although I have been very careful to record each arrival, 

 and note every fact of interst respecting our birds, yet, 

 owing to the many hurried trips that I was obliged to take, 

 arrivals of the more shy and retiring species unquestion- 

 ably escaped my notice, until increasing numbers made 

 them more conspicuous. At times, a day or so would pass 

 without the customary tramp; but afterwards, I was slow 

 to record any species, whose abundance indicated that they 

 had arrived during my absence. This partly explains a 

 number of the instances where " A " in the following tab le 

 -has been placed among the Brown County arrivals. 



