ECOLOGY OF ISLE ROYALE. 373 



Breeding: July 11, 5 young. 



Migration: Migrating at '\^"asliington Harbor from August 25 to 

 Sept. 12. 



The Nasliville Warbler ^vas usually seen near the tree tops, especially 

 along the border of clearings. They showed quite a preference for the 

 vicinity of high, open mixed forests. 



Breeding Notes: We found a Nashville Warbler's nest in the side 

 of a bluff about eight feet high. The nest was placed about two feet 

 from the foot of the cliff, which was not quite perpendicular at this 

 point. The nest was almost hidden by the moss, and was composed 

 of moss from the trees, the lining being made of grasses. It contained 

 five young, still in the down. There were several birch and spruce 

 trees close to the nest, completely shading it from the sun. The top 

 of the cliff was bare rock and entirely exposed. The parents fed in 

 the tamarack swamp near by, but refused to come close to the nest 

 while we were near. 



84. HelmitithopMla peregrina (647). Tennessee Warbler. 



Eange: Eastern North America, breeding from northern New York 

 and northern New England northward to Hudson Bay Territory; in 

 winter south through Mexico to Costa Rica and Columbia. 



Stations : Siskowit Bav, Forest, Y, 4. Washington Harbor, clear- 

 ings, I, '04, Forest, II, '04. 



Migration : August 2 to September 18. 



The Tennessee Warbler was perhaps the most abundant species of 

 this family on the island, although it was only recorded as a migrant. 

 The first seen was on August 2 in the coniferous and birch forest near 

 our- camp at Siskowit (V, 4). They were observed regularly after 

 this date, but never in verj' large numbers. We noticed these birds 

 soon after arriving at Washington Harbor (August 19). In a few 

 days their numbers were greatly increased and they continued plentiful 

 until the first of September, when their numbers gradually diminished 

 until the 8th, after which time only scattered individuals were observed. 

 On August 20 we saw flock after flock of these beautiful birds among 

 the scrub growth of alder, birch, and balsam, along the road (I, '04), 

 and also along Washington River (II, '04). They were evidently gather- 

 ing for the long journey south and were busy feeding in the brush and 

 low trees. On August 22 a large flock came into the door yard, feeding 

 about the doorstep on crumbs which had been thrown there. They 

 were also noticed diligently hunting over some wild mustard, scanning 

 every leaf and blossom carefully. 



85. Dendroica tigrina {650). Cape May Warbler. 



Range: Eastern North America, north to Lake Winnepeg and Hud- 

 son Bay Territory, west to the Plains; breeds from northern New Eng- 

 land northward; winters in the West Indies. 



Stations : Siskowit Bay, Forest, V, 4. 



Migration: August 15. 



This species was seen August 15 in a tamarack swamp (V, 5) at 

 Siskowit. About six or seven birds were seen in company with several 

 other migrating warblers. This is the only record we have for the 

 island. 



86. Dendroica caerulescens (654). Black-throated Blue Warbler. 



