162 PROCEEDINGS MANCHESTER INSTITUTE 



sheltered places, and snow lay in large masses everywhere in 

 the hollows and on northern exposures." 

 Dates : May 9 to Octocer 3. 



216. Dendroica pensylvanica (Linn.). Chestnut- 

 sided Warbler. 



A summer resident of the Transition area, common in the 

 southern parts of the state, but becoming somewhat less plenti- 

 ful among the White Mountain valleys. Mr. Maynard ('72) 

 reports it as " not very abundant " at Umbagog, where also it 

 breeds. It is generally confined to open bushy fields, or clear- 

 ings grown up with sprouts and bushes. Among the White 

 Mountains it is found mostly in the valley bottoms, but is quick 

 to take advantage of sprout growth in newly-made clearings even 

 far in the woods. Thus during the winter of 1898-99, a consid- 

 erable area of beech woods was cut on the west slope of Mt. 

 Bartlett at about 1,000 feet, and during the following year there 

 sprang up a considerable growth of sprouts. The next spring 

 a pair of Chestnut-sided Warblers was found to have ensconced 

 themselves there. In another case, a pair was found at slightly 

 over 2,000 feet on the Carter Notch trail, where a bushy growth 

 had arisen in a clearing made in the depth of the forest about a 

 lumber camp. Mr. E. A. Preble has also observed about Ossi- 

 pee the same readiness of these birds to quickl}' occupy the 

 young growth following the clearing off of woodland, a fact 

 which shows that in the keen struggle for existence, this species 

 is not slow to take advantage of an increase in the available liv- 

 ing area. 



Dates : May 6 to September 25. 



217. Dendroica castanea (Wils.). Bay-breasted 



Warbler. 



A rather rare spring and fall migrant in the southern parts of 

 the state, but sometimes common, as in May, 1901. In the 

 White Mountains and northward it is a fairly common summer 

 resident mainly of the upper Canadian zone. The range of this 

 species in summer overlaps that of the Black-poll Warbler for 

 about 1,000 feet, and extends below it to nearly an equal 



