SUPPLEMENT TO BIRDS OF ESSEX COUNTY 179 



counted them but they must number three of four hundred. They roost there 

 from May to October. During the early part of the season the morning song is 

 of great volume and beauty. By the middle of August nearly all song has ceased, 

 but the conversational notes that arise from the roost and the fluttering sounds as 

 the birds move about are very interesting and occupy as much time as the morn- 

 ing song of previous days. Before entering the roost in the afternoon the Robins 

 generally alight in the near-by fields or in separate trees and suddenly dive from 

 there into the " forest.'' In stormy weather they sometimes drop down directly 

 from the air. 



During April, 1919, I saw a partially albino Robin, apparently a male, about 

 my place. He had white patches on each side of the breast and on the back and 

 middle of his tail. As he flew he displayed a pure white rump and back up to the 

 middle and patches of white on the wings. The head was of normal color. 



330 [763] Ixoreus naevius naevius (Gmel.). 



Varied Thrush. 

 Accidental visitor from the West. 

 The record of 1864 remains unique. 



*33i [76sa] Saxicola oenanthe leucorhoa (Gmel.). 



Greenland Wheatear. 



Accidental visitor from the North. 



This addition to the list was seen at Pigeon Cove — a single bird — by Mr. C. 

 R. Lamb^ on September 17, 1910. Mr. Lamb says : " I flushed the bird four or 

 five times and as it made low flights from me, it spread its tail, which looked 

 short, and the large white spot, on the upper tail-coverts and tail, with broad 

 blackish band at the end of the tail, was particularly conspicuous." 



332 [766] Sialia sialis sialis (Linn.). 

 Bluebird. 



Common summer resident. February 16 to October 26; average date of 

 arrival for eight years, March 7. 



Eggs: April 23 to June 5. 



1 Lamb, C. R. Auk, vol. 29, pp. 250, 251, 1912. 



