.32 



BAY- EEEASTrD AVAEBLiE. 



Adult Mai.fs in Autumx. Similar to the females, but rather more 

 hay beneath. 



YorxG IN AiTiMN. Similar to the female, but the male has little 

 l:ay beneath, and the female often none at all. 



DiMtNsioNs. Length, 5.00; stretch, 9.00; wing, 2.80; tail, 2.I.J; 

 l)ill, .-12: tarsus, .90. 



f'o.Mr.vKisoxs. Known in the adult stage by the chestnut crown, and 

 hay beneath. Young birds aad females are cjuite similar t.j those of the 



Vm. 2: 



TaU feathers of Warblers; A, Bay-breastad ; B, Yellow t'aroatei ; C, Eaokburnian. 



I'lack-pcll, in the same ];lumagc, but may always be distinguished, even 

 when there is no trace of bay beneath, by the buff under tail coverts, 

 those in the Black-poll i.i all stages being white. 



Xi:sTs AND Eggs. Xcsts placed on hoiizontal branches of evergreen 

 trees at a considerable ebvatioa above the grouml, composed of fine dead 

 larch twigs and long moss, lined with fibrous roots, moss and hair. Kggs. 

 four to six in number, pale bluish green in color, spotted and blotched 

 with brown over the entire surface, the spots often becoming confiuent on 

 the larger end, foimirg a ring. 



General Habits. The Bay-breasted Warbler is 

 a rather rare niii^rant through Eastern Massachusetts, 

 and although I lound it exceeding)}' common in the re- 

 gion about Lake Umbagog in 1871, Mr. Brewster tells 

 me that it nearly deserted this section between 1875 

 and 1879. 



While migrating, the Bay-breasts often frequent hem- 

 locks, but are occasionally found in other trees. They 

 are not especially active warblers, being quite similar to 

 the Black-polls in this respect. 



