848 REPORT OF STATE GEOLOGIST. 



The members of this family afford an excellent opportunity for 

 migration notes. They are generally known, and any careful person 

 can make the observations. Their movements are greatly regulated 

 by weather. 



There is a favorite region two miles south of my home where Whip- 

 poor-wills and Brown Thrashers may be found from two days to two 

 weeks earlier than they reach me. For several years dates have been 

 kept that establish this. Mr. 0. M. Meyncke reports hearing the un- 

 mistakable voice of the Whip-poor-will in Highland Township March 

 2, 1897. The unprecedented warm weather of the previous few days, 

 resulting in unusual storms, may have induced its exceedingly early 

 appearance (The Osprey, Vol. I., May, 1897, p. 123). 



Whip-poor-will. 



Excepting that the earliest record is from New Albany, where it 

 was taken April 2, 1893, common April 5; at the following points it 

 was first noted the same year; when a second date is given it indicates 

 the date it became common: Moore's Hill, May 7; Bloomington, April 

 29; Kilmore, April 27, May 1; Lafayette, April 29; Camden, May 2; 

 Petersburg, Mich., April 15, April 20. 



In 1892, New Albany, April 6, April 12; Brookville, April 6; 

 Bloomington, May 7; Rochester, April 23, April 30; Medora, April 23, 

 May 1; Petersburg, Mich., April 28, May 1. In 1885. it was first 

 noted at Brookville April 18; Chicago, 111., April 21. In 1886, Brook- 

 \ille, April 14; Bloomington, April 21; Petersburg, Mich., April 14; 

 Chicago, 111., May 6. 



In sixteen years, the earliest date of first arrival at Brookville was 

 in 1893, as given, and the latest, April 26, 1881. In the southern 

 half of the State it is generally common between April 5 and 20; in 

 the northern half, between April 17 and May 5. They mate soon after 

 arriving. I noted them mating April 25, 1887. Eggs are usually 

 found from May 1-10, at Brookville. The two eggs are usually laid on 

 a leaf or a few leaves in a slight depression. Upon our wooded hill- 

 sides they may be found upon the natural terraces, and frequently 



