n 
124 THE. Witson BuLLETIN—No. 75. 
The tree swallows rest in the alder-poplar fringe on the mar- 
gin and around the islands. The Cedarbirds later on, when 
the berries ripen, reap a rich harvest in them. Toward the 
end of August these various large and small berry-bearing 
shrubs, such as high and low huckleberries, large and small 
cranberries and blueberries Viburnum alnifolium, \emopan- 
thus mucronata, ete., are fairly alive with birds. Then the 
Cedarbird is in its glory, but also the Robin, Catbird, Brown 
Thrasher, Flicker and others invade the bog and share in 
the rich feast. Then also the Myrtle Warbler, Dendroica cor- 
onata, is more apparent than earlier in the season; it breeds 
here sparingly and its soft, babbling little warble, Whit, whit 
whit whit drrrr, something like the Nashville Warbler, is 
seldom heard— Of the wren family, the House Wren only 
is by no means rare in the bog: and in the spruces Blue Jays 
and Chickadees are frequently heard or seen. 
Of birds of prey, I have seen comparatively few. Now 
and then a Marsh Hawk gets up and circles overhead to 
watch the movements of the intruder. But the Sharp-shinned 
Hawk, Accipiter velox, seems to prefer the little, thickly 
branched spruces found here for his nesting sites. On June 
8, 1909, I found the rather bulky nest of a pair in the top of 
a small spruce, about twelve feet up, with four eggs. The 
female stayed on till the ascent was begun, then she flew 
off noiselessly. Not so noiseless, however, were a pair or 
two in a stand of larger spruces at the eastern end of the 
bog, near some fine Arethusa bulbosa and Pogonia ophio- 
glosscides. These had the young ones out of the nest —it 
was August 23,—and resented any intrusion with loud pro- 
tests, showing little fear of me. 
Another interesting feature in connection with visits to 
the bog, is to see how on different days in the summer 
months, the different birds in turn predominate, or make 
themselves most apparent. While at one time the White- 
throats are most noticeable, and the Yellow Palm Warblers 
are out of sight, the next time the reverse may be the case. 
Thus on August 5, 1909, hypochrysea was very apparent, 
