Carolina, while it is abundantly found in the State of New Jersey close
to the sea shore. There you would think that it had changed its habits ;
for, instead of skipping among the taller branches of trees, it is seen
moving along the trunks and large limbs, almost in the manner of a Cer-
thia, searching the chinks of the bark for larvae and pupas. They are
met with in groups of ten, twelve, or more, in the end of April, but
after that period few are to be seen. In Massachusetts they begin
to appear nearly a month later, the intervening time being no doubt
spent on their passage through New York and Connecticut. I found
them at the end of May in the eastern part of Maine, and met with them
wherever we landed on our voyage to Labrador, where they arrive from
the 1st to the 10th of June, throwing themselves into every valley covered
by those thickets, which they prefer for their breeding places. It also
breeds abundantly in Newfoundland.
In these countries it has almost become a Flycatcher. You see it darting in all directions after insects, chasing them on mng, and not un- frequently snapping so as to emit the clicking sound characteristic of the true Flycatcher. Its activity is pleasing, but its notes have no title to be called a song. They are shrill, and resemble the noise made by strik- ing two small pebbles together, more than any other sound that I know. They may be in some degree imitated by pronouncing the syllable sche, sche, sche, sche, sche, so as progressively to increase the emphasis. I found the young fully grown in the latter part of August, but Avith the head as in the females, and like them they obtain their full plumage during the next spring migration, after which these birds return south- ward. They raise only one brood in the season, and if any of them breed in the United States, it must be in the northern parts. They are seldom seen in autumn in the States, and very seldom during the summer months.
The Black-poll Warbler is a gentle bird, by no means afraid of man, although it pursues some of its smaller enemies with considerable courage. The sight of a Canadian Jay excites it greatly, as that marauder often sucks its eggs, or swallows its young. In a few instances I have seen the .Jay confounded by the temerity of its puny assailant.
The occurrence of this species so far north in the breeding season, and the curious diversity of its habits in different parts of the vast extent of country which it traverses, are to me quite surprising, and lead me to add some remarks on the migration of various species of Sylvia, which, like the present, seem to skip, as it were, over large portions of the country.
