Birds of The Palisades Interstate Park 49 
19. Worm-eating Warbler. Helmitheros vermivorus (Gmel.) 
The Worm-eating Warbler is not well known, but it is one of 
the common birds of the Bear Mountain locality and the Park in 
general. Its colors are not striking, and because its song so closely 
resembles that of the Chipping Sparrow its presence is easily over- 
looked where the familiar little sparrow abounds. The warbler, 
however, does not frequent the places favored by the sparrow, for 
it prefers the ravine slopes above the base of the mountain, where 
it sings along the bases of the rock terraces, and hides its nest in 
the tufted vegetation and mosses of the ledges. 
20. Black and White Warbler. Mniotilta varia (Linn.) 
This interesting little Warbler is a common summer resident of 
the Bear Mountain locality and the Park in general. It is observed 
most frequently in the dry woods, where the broken canopy permits 
a growth of laurels and other shrubbery, with frequent small water- 
margins. It can be readily identified by its peculiar markings, 
which consist of black and white streaks. The singing male gen- 
erally selects a bare branch, shifting his station over a limited area 
and uttering a few songs at each resting-place. The full song 
may be suggested as follows : “ Weese weese weese weese, eesel 
eesel, weese weese.” Frequently the “ eesel ” portions are omitted, 
and the number of the “ weese ” notes may vary, but the general 
character of the song is quite uniform. 
21. Yellow-throated Vireo. Lanivireo flavifrons (Vieill.) 
This vireo was observed only in the ravine and on the rock ridge 
south of the boat landing and railroad station of Bear Mountain 
Inn. It is more restless in its singing activities than the Red- 
eyed Vireo, traversing the limits of its song area from time to 
time as it utters its rich phrases of melody. In its singing it fre- 
quently utters a call closely resembling the scolding of the Yellow- 
breasted Chat. The Yellow- throated Vireo sings in more open 
and exposed positions than the Red-eyed, shifting its stations more 
actively, and frequently interspersing the Chat-like scolding with 
the regular songs. Moreover, phrases of two notes are more com- 
