ECOLOGY OF ISLE ROY ALE. 375 



north side of Rock Harbor. It was placed on a horizontal limb of a 

 white spruce about six feet from the ground. Like the first one this 

 overhung the water, but not so far above it. It was composed of small 

 twigs and grasses, lined with feathers and contained three young about 

 two daj'S old. On July 2S a young Myrtle Warblei- just out of the 

 nest was found on a small island (III, 1). Four nests were found on 

 two small islands near the end of Rock Harbor, one of which con- 

 tained small and nearly full-fledged young July 21. The other two 

 were empty, but gave evidence of having been recently used. They 

 were all in coniferous trees and ranged from six to ten feet above the 

 ground. 



No nests were found at Siskowit, probably because the breeding sea- 

 son was nearly over, and due, in part also, to our short stay at tJiis 

 location. A juvenile male was taken here on August 3, and several 

 were seen feeding in the tree tops near the outlet of Siskowit Lake ( V, 

 9) August 5. At Washington Harbor they were observed on Augnist 5, 

 6 and 7 ; after our return, from August 18 to September 12. 



88. Dendroica maculosa (657). Magnolia Warbler. 



Range : Eastern North America west to the base of the Rocky Moun- 

 tains, and casually to British Columbia; breeding from northern New 

 England, northern New York, and northern Michigan, to Hudson Bay 

 Territory and southAvard in the Alleghanies to Pennsylvania. In winter, 

 Bahamas, Cuba, and south through eastern Mexico to Panama. 



Stations: Rock Harbor, Spruce and Balsam Forest, I, 2-3; Grove of 

 Evergreens, I, 1, I, 4; Spruce and Cedars along Benson Brook, II, 1, 

 II, 4. Siskowit Bay, Forest, Y, 4. Washington Harbor, clearing, I, '04 ; 

 Forest, II, '04. 



Breeding: July 7, female and joung. 



Migration : August 28, September 12. 



Magnolia Warblers were common in the balsam and spruce forests 

 and also in the second growths of birch at all three localities, but could 

 not be called migrants. 



Breeding Notes: A female was seen feeding a young bird in the 

 top of a birch tree on July 7. The same day a female was found in a 

 spruce thicket feeding a young bird which had just enough feathers to 

 enable it to fly six or eight feet. Another brood of four young were 

 found just back of the light-house in a thicket of birch. These were 

 scarcely able to fly, two being caught by hand. The following day 

 (July 8) several families were found in the tamarack and arbor vitae 

 swamps (I, 4). One brood was large enough to fly. They were also 

 found quite regularly along Benson Brook (II, 1) and at McCargoe 

 Cove (II, 4). 



General Notes: During migration the birds preferred the banks of 

 the river and the roadside, although scattered individuals were occa- 

 sionally met with in the more open parts of the coniferous forest, especi- 

 ally where it was suflBciently open to allow the growth of birches. 



89. Dendroica castaiiea (660). Bay-breasted Warbler. 



Range : Eastern North America, north to Hudson Bay. Breeds from 

 northern New England and northern Michigan northward, in winter 

 south through eastern Mexico (rai-e) and Guatemala to Columbia. 



Stations: Reck Harbor, Spruce and Balsam Forest, I, 2-3; Rock 



