*145. Black-throated Blue Warbler 
(Dendroica caerulescens 
(Gmelin)) 
This bird is a common summer resi¬ 
dent. The species also has a preference 
for the swamp forest and the sugar 
maple -yeHow birch forest. In 1904 and 
1905 specimens were taken and a number 
of sight records were obtained, espe¬ 
cially in favored swamp habitat of bal¬ 
sam, spruce, and tamarack (14). All 
sight records obtained in the 1940's 
and early 1950's were taken from the 
maple forest (29,30,35). Shelton re¬ 
ported two records in early spring in 
an aspen-birch-conifer habitat; these 
were probably migrants, since all sum¬ 
mer records were from the maple 
forest (39). 
**146. Myrtle Warbler ( Dendroica 
coronata (Linnaeus)) 
This warbler is a common summer 
resident and migrant. Preferred habi¬ 
tats include the lake shores and 
beaches, the birch-conifer type, and 
the aspen-birch-conifer type. In 1904 
and 1905, adult specimens were taken, 
nests and young were located, and 
specimens were noted almost daily (14, 
22 ) . This warbler was also observed in 
1929, 1930, and 1937 (21) . During the 
1940's and early 1950's, general ob¬ 
servations indicate, the summer resi¬ 
dent population was small and the spe¬ 
cies was most common during the spring 
migration period (27,29,30,35,36) . 
Shelton noted specimens as early as 
May 9 and as late as October 14 and 
considered the species to be one of 
the most common summer warbler in the 
spruce-fir-birch habitat (39). 
**147. Black-throated Green Warbler 
( Dendroica virens (Gmelin)) 
This bird is a common summer res¬ 
ident. Preferred habitats include the 
sugar maple-yellow birch type, the 
birch-conifer type, and the aspen- 
birch-conifer type. In 1904 and 1905, 
specimens were taken, nests and young 
birds were found, and a fairly large 
number of sight records were made (14, 
11,22) . On visits to the island in 
1929 and 1930, a specimen was taken 
and sight records were obtained (21). 
During the 1940's and early 1950's 
numerous sight records were made. On 
the basis of these records, the spe¬ 
cies was regarded as a common summer 
resident over most of the island (29, 
30,35,36). Also, records kept by 
Shelton in the early 1960's showed 
that the species was one of the most 
common summer warblers, especially in 
the spruce-fir-birch forest (39). 
148. Blackburnian Warbler (| 
( Dendroica fusca (Muller)) 
This warbler is a common summer 
resident. The habitats most preferred 
are the sugar maple-yellow birch type, 
the birch-conifer type, and the aspen- 
birch-conifer type. One specimen was 
taken in 1929, and sightings were made 
in 1929, 1930, and 1937 (21). Sight 
records kept during the 1940's and 
early 1950's indicate that this war¬ 
bler was a common summer resident (27, 
29,30,35). In the early 1960's Shelton 
thought that it might not be a regular 
summer resident (39). 
*149. Chestnut-sided Warbler 
( Dendroica pensylvanica 
(Linnaeus)) 
This warbler is a common summer 
resident. Habitat preferences are the 
more open aspen-birch-conifer type, 
the 1936 burn area, and the clearings 
and partial clearings. The species 
was recorded for the first time in 
1924, and specimens were collected in 
1930 (21) . During the 1940's and 
1950's, it was recorded in all parts 
of the island and was regarded as a 
common summer resident (27,29,30,35). 
In the early 1960's Shelton found it 
to be an abundant summer resident, 
usually in the aspen and birch areas ( 39) . 
150. Bay-breasted Warbler ( Dendroica 
castanea (Wilson)) 
45 
This warbler is a rare summer 
resident and an uncommon migrant. 
