BIRDS OF ESSEX COUNTY. 293 



wonder and pity when he thinks of young birds, whose brief Hves have been 

 passed in sheltered woods, struggling south in the dark nights along rocky and 

 wave-beaten coasts. 



[658] Dendroica cerulea (Wils.). Cerulean Warbler. This is entered in Putnam's Mist, but 

 it is possible that it was confused with the D. cariiUscens, Black-throated Blue Warbler. According 

 to Howe and ."Mien there is only one authentic record of the Cerulean Warbler for the State, namely, 

 of a female taken at Cohasset, in 1874. 



276 [659] Dendroica pensylvanica (Linn.). 

 Chestnut-sided Warbler. 



Very common summer resident ; May 6 to September ; average date of 

 arrival for seven years. May 10. 



Eggs : May 29 to June 15. 



This Warbler illustrates very well the difference in the method of studying 

 birds now from that of 1876, when I first made its acquaintance at Magnolia. 

 Then, field-glasses were not thought of, and with Samuels' Birds of New Eng- 

 land for a guide, a gun was necessary as an introduction. At that time I 

 entered in my note-book, probably after a long chase, that the common song 

 of the Chestnut-sided Warbler sounded like "Don't you wish you could catch 

 me," whereas now-a-days with field-glasses and delightful bird-books the song is 

 rendered " Very very glad to meet you." '^ No doubt the bird's opinion of the 

 student has changed accordingly ! 



The other song of this Warbler is short and rambling, at times suggestive 

 of a feeble Purple Finch. 



277 [660] Dendroica castanea (Wils.). 

 Bav-breasted Warbler. 

 Rare transient visitor ; May 20 to -; September — to September 22. 



' F. W. Putnam: Proc. Essex Inst,, vol. i, p. 207, 1S56. 



2 Ralph Hoffmann : A Guide to the Birds of New England and Eastern New York, p. 118, 1904. 



