80 Tue WILSON 
Merganser. 
Woodcock ? 
Spotted Sandpiper. 
Baid Eagle. 
Yellow-billed Cuckoo. 
Black-billed Cuckoo. 
Belted Kingfisher? 
~ Northern Hairy Woodpecker. 
Downy Woodpecker. 
3GLLETIN—NO. 7d. 
Goldfinch? 
Field Sparrow. 
Song Sparrow. 
Swamp Sparrow? 
Barn Swallow. 
Cedar Waxwing. 
Red-eyed Vireo. 
Warbling Vireo. 
Yellow Warbler. 
Northern Flicker. Redstart. 
Chimney Swift. Catbird. 
Kingbird. White-breasted Nuthatch. 
Crested Flycatcher. Chickadee. 
Least Flycatcher. Robin. 
Wood Pewee. Common Tern 
Crow. Black Duck? 
Herring Gull? 
Piping Plover, in other years 
but not in 1910 (see p. 92). 
Purple Finch. 
Blue Jay. 
. 
The absence of many of the species that occur commonly 
on the mainland is easily accounted for. As the island is 
small, there are only a few habitats, and these are mostly of 
very limited extent. Then again many plants and many spe- 
cies of animals other than birds are absent from the island. 
For instance, on the mainland one of the most common trees 
in the sand region about the bay is the jack pine but this 
species is represented on the island by only one small tree, 
and it is doubtless owing to this that, although on Sand Point, 
less than eight miles away, we found the pine warbler a 
common and breeding species in 1908, and it is known to 
breed commoniy in the counties just across the bay to the 
west, the species was not seen on the islands even during mi- 
gration. Its absence can be accounted for by the absence of 
the jack pine. which seems to be its favorite tree for both 
nesting and feeding. The absence of the scarlet tanager and 
Baltimore oriole cannot be explained in this way, but many 
other species of birds, as the meadowlark, bobolink, rails 
and bitterns, do not find suitable habitats on the islands, and 
