THE SEMI-ANNUAL. 27 



Black and Yellow Warbler, De^tdroica maculosa. 



Spring and Fall migrant ; never very plenty. Found in the 

 tops of the alders and hornbeams that fringe the streams. 



Chestnut-sided Warbler, Dendroica fensylvanica. 



Noted for the first time in the Spring of 1S90 when it w^as 

 common, frequenting open, deciduous v^oods. Late in June it 

 was heard in full song in an upland grove and may yet be found 

 to bi-eed here. 



Bat-breasted Warbler, Dendroica castanea. 



Seen only in Spring and Fall. Rarer than the preceding. It 

 frequents the same growths, keeping perhaps a little higher up 

 in the trees. 



Yellow-rump Warbler ; Myrtle Bird, Dendroica coronata. 



A very common Spring and Fall migrant,, found in open, 

 deciduous woods. It is generally in full song when it arrives in 

 Spring. ' 



Blackburnian Warbler, Dendroica blackburnice. 



Tolerabl}' common migrant in deciduous woods. 



Blalk-Throated Green Warble k, Dendroica virens. 



The commonest of our Warblers, equaling the Summer 

 Yellow Bird in numbers, though their habitats do not overlap ; 

 the Green Warbler being found only in the thickly wooded 

 ravines and the retired upland woods, where its drawling note 

 is heard all day long. I have never found its nest. 



Blue Yellow-backed Warbler, Coinpsothfypis americana. 

 Somewhat rare migrant, found usually in hemlock woods. 



Golden Crowned Thrush ; Oven Bird, Siurus aurocapilhifi. 



Common Summer resident, inhabiting the larger tracts of 

 woodland, whether on the hillside or in the valley. It is one of 

 the ground warblers and is usually found low down in the trees 

 or on the srround. 



