ITO The Wilson Bulletin - — No. 81. 



be found in the roost at night, this year I found them a.- 

 early as the 14th of June, last year they were somewhat later. 

 The first are apparently family groups and have little to do 

 with each other, each group acting independently of the 

 rest. From now on the flock -increases rapidly and by the 

 middle of July several hundred spend the night at the roost, 

 separating during the day, later when the berries ripen they 

 gather in flocks at the feeding ground flying to and from 

 the roost in a body. It is at this time that the flock increases 

 most rapidly usually reaching its height about the middle of 

 August, although this year it did not do so until the middle 

 of September, possibly, because the drought killed most of 

 the berries. 



The robins begin coming in about half an hour before 

 sunset, the first arrivals alighting in a number of dead trees 

 about the edgii of the roost where they await the others or un- 

 til it becomes darker when they join an incoming flock and fly 

 to the roost. The old birds are the first to arrive and are cau- 

 tious, the young come later and take their places heedlessly, 

 frequently alighting within a foot of a person standing in the 

 roosting ground. 



As the sun sinks large flocks fly in. I have seen as many 

 as 145 in the air at one time. 



August 2r. lltOlt. (5:40 p. m.) 1(5 — 4— ^'—1—1—4— 8— 



(5:45) 1— 1_.-,_18— y— 145 12-1— (5:5?) 35—40—8— 



35— 1(>— ;37— 4— 20— 40— 4'2— 1(1— 30— 4— ( (> :00') 42—8—5 

 — 5— 1— ;5— (i_((;:i)5)_ii — i_j — i — i — i_n_]_( c,-.\i)) 



4. Tot'il. T7() from the west. 



Sept 20, 1010. (4:48) 8— (4:50) 4— 4— (5:04) 5—5—32 

 — 21— 11— 1—2— 8— 17— 1—1— (i—( 5:15) 11—3—2—1—4 

 —4—23—35—50—31 — 1—25-14-21-7-4—25—7—3-32 

 — (5:25) 24— 30— 22— 33— 1— (5:30) 16—2-2—23-7-2 

 —4— 2—1— (5:35) ;5— (^i— 5— 1— 1. Total ()07 from the 

 north, 100 from the west, many from the east and south, there 

 are probably over 1000 robins roosting there this year. 



I have noticed that they come in earlier on cloudy days 

 than on clear davs. 



