1904] Notes concerning New Brunswick Warblers. 99 



partial to roadside tangles of willows, alders, and rosebushes. The 

 nests are compact structures built of plant fibres and grasj-es, 

 somewhat felted together with down from the fruits of the wil- 

 lows and poplar trees. Several nests observed were within three 

 feet of the wheel tracks of highways. Nests of average size 

 measure 1.75 inches in depth and diameter, inside, 3 inches in out- 

 side diameter. From three to five eggs complete a set. Both 

 birds engage in incubating, which period lasts from ten to twelve 

 days. This species of warbler I have never observed on the high- 

 lands back from the river vallej's. They depart southward in 

 September. 



Black-throated Blue Warbler, Deudroica ccenilescciis. 



About the middle of the month of May, if we happen to be in 

 the vicinity of mixed-growth woodland, we will be likely to hear a 

 song of zye-zye-zye, and will know that the black-throated blue 

 warbler has arrived for its summer sojourn with us, during which 

 season it is tolerably common. A nest of this species found July 

 21 was built of bark and fibres, in a small beech bush two feet up. 

 The cavity of this nest measured 1.50 inches in depth and diameter 

 and contained three eggs, white with obscure olive-brown mark- 

 ings about the larger end. As the writer passed this nest, the 

 female flushed from it, and apparently with several wings and legs 

 injured and dragging she fluttered about endeavouring to allure her 

 disturber from the nest. The male kept quietly at a distance of 

 about ten yards. 



These birds are quite expert fly-catchers and may often be 

 seen tumbling through the tree tops in pursuit of insects. 



Myrtle Warbler, Deudroica coronata. 



This species is the first of the warblers to arrive during spring 

 migration, at which time it is not uncommon. During the autumn 

 migration it is very common, and a few breed in central New 

 Brunswick. Ordinarily they are with us from April 20th until 

 September 25th. They are expert fly-catchers, and keep more to 

 the fields in which bushes grow, than do any of our other warblers. 

 One nest found was placed six feet up in a tamarack bush and 

 contained four eggs. The birds ar§ very much concerned when 

 one is in the vicinity of their nest. 



