Robins 
White- 
bellied 
Swallows 
Song 
Sparrows 
Red-wing 
Blackbirds 
the summer birds have not all arrived as yet. There was 
very general singing when the sun came out this afternoon 
but only general calling this evening, although the air was 
mild and still. 
A little before sunset a flock of nine White-bellied 
Sv/allows passed over Great Meadow, flying well together 
and very steadily, as if migrating, in a north-east direction. 
Later I saw a single bird floating and circling and evidently 
feeding. 
Song Sparrows were very numerous along the river 
to-day. There were three or four in the belt of bushes at 
Ball's Hill where before I have seen only one or two at most. 
Singing was very general and well sustained. Two birds 
which kept together in some bushes appeared to be mated. 
The female (?) took short flights, the male following her 
closely with wide-spread tail. The males were continually 
chasing one another about. One drove another across the 
river^when the pursued turned sharply about and drove the 
pursuer back. The spreading of the tail during flight was 
a marked feature of these gentle battles. 
Red-wings have increased in numbers since yeaterday. 
A flock of fifteen or twenty males spent the day in a 
flooded thicket near the east end of Ball's Hill, but sting- 
out in song every little while — the first medley singing 
I have heard this year. I suspect that these birds were 
migrants 
