Vol. xir 

 'S95 . 



Trowbridge, Hmuk Flights in Conncctictit. 



259 



Average Measurements of Ardea znrescens aiithonxi. 



Ardca -•ircscens. 



I Adult male. Fort Snelling, Minnesota. 480 



5 (Adult?) females.] Highlands of the Hudson River, New Vork. 451 



705 

 679 



75 64 



76' 58 



54 56 



51 I — 



HAWK FLIGHTS IN CONNECTICUT.! 



BY C. C. TROWBRIDGE, COLUMBIA COLLEGE. 



Doubtless many naturalists and collectors have observed large 

 flights of different species of birds, from time to time, along the 

 eastern coast of the United States, and they have probably noted 

 also that certain birds were sometimes common and even abun- 

 dant in flights, while at all other periods they were very rarely 

 seen in that part of the country, where they had suddenly become 

 so plentiful. 



Although the reasons for the appearance of unusual numbers 

 of birds, in some localities, at one time, have not always been 

 understood, causes of the occasional abundance of some of the 



^ Read before the New York Academy of Sciences, May 13, 1895. 



