About the middle of August, the old and young birds form more ex-
tensive associations, flying about in loose flocks, which are continually in-
creasing, and alighting in groups on tall trees, churches, court-houses, or
barns, where they may be seen for hours pluming and dressing themselves,
or removing the small insects which usually infest them. At such times
they chirp almost continually, and make saUies of a few hundred yards,
returning to the same place. These meetings and rambles often occupy a
fortnio-ht, but generally by the 10th of September great flocks have set
out for the south, while others are seen arriving from the north. The
dawn of a fair morning is the time usually chosen by these birds for their
general departure, which T have no reason to believe is prevented by a
contrary wind. They are seen moving off without rising far above the
tops of the trees or towns over which they pass ; aud I am of opinion
that most of those large parties usually migrate either along the shores of
the Atlantic, or along the course of large streams, such places being most
Hkely to afford them suitable retreats at night, when they betake them-
selves to the reeds and other tail grasses, whenever it is convenient to
do so, although I have witnessed their migration during a fine clear and
quiet evening. Should they meet with a suitable spot, they ahght close
together, and for a while twitter loudly, as if to invite approaching flocks
or stragglers to join them. In such places I have seen great flocks of
this species in East Florida ; — and here, reader, I may tell you that the fogs
of that latitude seem not unfrequently to bewilder their whole phalanx.
One morning, whilst on board the United States Schooner " Spark," Lieu-
tenant commandant Piercey and the officers directed my attention to some
immense flocks of these birds flying only a few feet above the water for
nearly an hour, and moving round the vessel as if completely lost. But
when the morning is clear, these Swallows rise in a spiral manner from
the reeds to the height of thirty or forty yards, extend their ranks, and
continue their course.
I found flocks of Barn Swallows near St Augustine for several days in succession, until the beginning of December ; but after the first frost none were to be seen. These could not have removed many degrees farther south for want of proper food, and I suspect that numbers of them spend the whole winter along the south coast of the Gulf of Mexico.
The flight of this species is not less interesting than any other of its characteristics. It probably surpasses in speed that of any other species of the feathered tribes, excepting the Humming Bird. In fine calm weather
