80 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



During the winter these hawks seldom circle high in the air, 

 as is so common at other seasons of the year, although they have 

 been noticed doing this (Feb. 14, 1903, L. B. B.). 



Mr. C. L. Rawson of Norwich, who has made an extensive 

 study of the hawks in that vicinity, has recorded in his numerous 

 articles in 0. and 0. a considerable mass of interesting data on 

 eggs of this species, peculiar markings, and the recurrence of 

 these markings in one individual. Other data as to the number 

 and description of eggs taken from the same bird in successive 

 years are numerous, as well as descriptions of nests and their 

 location. We refer those interested in the subject to his articles 

 as recorded in the bibliography. 



Buteo platypterus (Vieillot). Broad-winged Hawk. 



A tolerably common summer resident from May to Septem- 

 ber, and common fall migrant in September; breeds most abun- 

 dantly in Litchfield county. 



Earliest record. New Haven, April 21, 1888; Portland, 



April 19, 1893. 



Latest record. New Haven, Oct. 16, 1901, Nov. 13, 1906 

 (E. S. W.) [?] ; Portland, Oct. 22, 1892. 



Nest. Situated in the center of the deepest woodland acces- 

 sible. They vary in material from nests like those of the Red- 

 shouldered Hawk, well-lined with various soft materials, to 

 others resembling those of Cooper's Hawk, a loose platform of 

 sticks lined with a few square pieces of bark. 



Eggs. 2 or 3 ; about the middle of May. 



Nesting dates. Earliest record. April 19, 1884, one egg, 

 later three (L. B. B.) ; May 6, 1900, two eggs (Blackwood) ; 

 May 14, 1894, three young, ten days old (G. L. H.). Latest 

 record. June 16, 1898, two eggs (H. W. F.). 



The bird is very shy and is seldom seen on the nest. 



One bird of this species with both ovaries developed has been 



found by L. B. B. 



This species frequently predominates in the hawk nights de- 

 scribed by C. C. T. 1 



Trowbridge, Hawk Flights in Connecticut, Auk, xii, 3, pp. 259-270. 



