2 University of Michigan 



they recorded ninety-seven species, with a daily average of 

 nineteen. In addition to his bird observations, Dr. Gates con- 

 tril^uted the detailed ecological portion of this report. In 1912 

 Prof. Smith was again at the Biological Station and for eight- 

 een days made observations on the bird fauna, which are incor- 

 porated in this paper. In 1913 and 1914, Mr. Compton was in 

 cha'rge of the bird work ; his list includes one hundred eleven 

 species, with notes on abundance and habitat preferences. Mr. 

 Wood taught the course in field ornithology in 191 5, and se- 

 cured data on one hundred fifteen species, noting a daily aver- 

 age of twenty-two. 



In the following paj^er, which has been partly designed to 

 meet the needs of the students of the Biological Station, the 

 authors have endeavored to present accurately the status of 

 each species, with its activities and habitat so far as known. 



I.OCATlOiX AND GENERAL, DESCRIPTION OF THE REGION. 



Douglas Lake is situated in Cheboygan County, about mid- 

 way between Lakes Huron and Michigan, seventeen miles 

 from the northern end of the Southern Peninsula. The ex- 

 treme length of the lake is about four miles, the width one and 

 one-half miles. In the vicinity are other lakes, of which Burt 

 Lake, two and a half miles south of the station, is larger than 

 Douglas Lake. The soil throughout the region is sand or sandy 

 loam. There are few rivers and but three are worthy of 

 mention — Maple River, draining Douglas Lake into Burt 

 Lake by surface drainage. Carp Creek, draining Douglas Lake 

 into I)urt Lake by underground channels which come to the 

 surface as the Big Springs, and Bessey Creek, emptying into 

 Douglas Lake. 



At the mouth of Bessey Creek there is a marsh of small 

 extent, and the rest of the land either is or has been wooded. 



