NOTES ON THE MIGRATION OF THE WHITE-BELLIED SWALLOW 187 
Delaware River we experienced another cold wave, the wind being north- 
west, and quite high. 
On Nov. 12th. in Pamlico Sound, North Carolina, we again came 
up with the Swallows, here we saw a large flock flying about the marsh- 
es of the western side. They were still about on the following day. 
Dec. 29th., at St. Catherine’s Sound, Georgia, I shot a White-bellied 
Swallow out of a large flock that were flying over the marshes. The 
next day was very cold, there having been a hard frost during the night, 
consequently the Swallows disappeared. 
Jan. 4th., we again caught up with the Swallows at St. Simon’s 
Island, Georgia, but there were only a few specimens. 
On Jan. 7th., when near the St. Johns River we saw the Swallows 
once more, and being now in the milder climate of Florida, saw them 
nearly every day. They are constantly resident in Florida during win- 
ters, but wander about the state in large flocks, apparently visiting var- 
ious portions, but never remain long in one place north of the middle sec- 
tion. In the vicinity of Indian River they may be seen every day. 
It is probable that this portion of Florida, and southward, is the winter 
home of the White-bellied Swallows, and that during warm spells some 
wander further north. 
By the foregoing notes it will be seen that this species of Swallow 
keeps only just so far beyond the reach of cold as will warrant it finding 
a sufficient supply of food, although in autumn the White-bellied Swal- 
lows eat a large number of the fruit of the bay berry, at least while they 
are in Massachusetts, yet it is quite probable that they cannot subsist 
on this diet long, but must also obtain some insects. That they do sub- 
sist for a time upon bayberries after the frosts have destroyed many of 
the insects which form their habitual means of sustenance, shows that 
they migrate with considerable reluctance. Thus, while it is probable 
that the White-bellied Swallows cannot endure any great degree of cold, 
they certainly do remain in the north long after frosts, and thus their 
migrations are governed, in a great measure, by the food supply. 
