I40 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 



Nest. On a beam or against a rafter in a barn or slied, or 

 more rarely under the eaves. 



Eggs. 4-7; last of May. 



Nesting dates. Earliest redord. May 15, 1894, one egg (L. 

 B. B.). Latest record. Sept. 3, 1892, five eggs slightly incubated 

 (Dickerman of Danbury).^ 



A set of seven eggs was collected by L. B. B. in New Haven, 

 May 24, 1893. 



Iridoprocne bicolor (Vieillot). Tree Swallow. 



An abundant spring, summer, and fall migrant in April and 

 May, and from July to October; a rare summer resident, but 

 more common in Litchfield county; still rarer winter resident. 



Spring migration. Earliest record. New Haven, March 25, 

 1893; Portland, March 27, 1899. Latest record. New Haven, 

 May 27, 1902; Portland, May 17, 1901. 



Fall migration. Earliest record. New Haven, July 8, 1904; 

 Portland, July 14, 1886. Latest record. New Haven, Nov. 21, 

 1900; Portland, Nov. i, 1910. 



Winter records. Winter, 1901-2, several spent the winter at 

 Saybrook (J. N. C), where about a dozen were seen Jan. 31, 

 and 20 or 30 more by L. B. B., March 18, besides a probable 

 straggler from that flock in Guilford, March 24. The stomachs 

 of three collected were full of bayberries upon which they had 

 lived during the winter. 



Nest. Usually in a hollow tree in an old woodpecker's nest, 

 10-15 fs^t from the ground. 



Eggs. 4-6; early in June. 



Nesting dates. Earliest record. May 24, 1884, four eggs (J. 

 H. S.). Latest record. June 20, 1898, five eggs (Hill). 



In the spring there appear to be two flights, one chiefly of 

 adult males early in April, the other largely of females about the 

 middle of May. This swallow is the earliest migrant to return 

 from the north, as many as 500 having been seen near New Haven 

 as early as July 14 (1904) by L. B. B., and the last swallow to 

 stay with us in the fall, several hundred having been seen by him 

 on Oct. 6, 1903, and about a thousand on Oct. 24, 1898, and 

 Oct. 13, 1905, which had been spending the nights in the rushes 

 on the Quinnipiac marshes. 



1 O. and O., xvii, ii, p. 172. 



