: which are coarse gravel (figs. 8 and 
9 ). Shorebirds are scarce. The most 
common species is the spotted sand¬ 
piper, especially along rocky shores, 
ggveral other species have been re¬ 
dded during migrations, but none 
1 in great numbers. 
Mergansers and herring gulls are 
frequent users of offshore rocks and 
small islets, where they are relative¬ 
ly free from land predators. Gulls 
normally nest on these islands and 
reefs. 
BIRD SPECIES OF ISLE ROYALE 
Status, Abundance, and Habitat Type 
Kfty to habitat types : 
1 . 
2 . 
3. 
4. 
5. 
6 . 
7. 
8 . 
9. 
10 . 
11 . 
Sugar maple-yellow birch climax forest 
Spruce-fir-birch climax forest 
Aspen-birch-conifer forest 
Aspen-birch (1936 burn) 
Swamp forest 
Open areas 
Riparian brush 
Beaver ponds and streams 
Inland lakes, ponds, and sheltered harbors 
Lake Superior 
Lake shore, beaches, small islands, and rocky reefs 
Species 
1 Permanent 1 
1 Resident 
Summer 
Resident 
■ Winter 
Resident , 
Migrant 
! Rare I 
Habitat 
type 
Common 
Rare 
Common 1 
Uncommon 
Rare 
Common \ 
Uncommon 
Rare 1 
Common ! 
Uncommon 
Rare 
1. Common Loon... 
• 
• 
X 
0 1 
X 
0 
0 
9, 10, 11 
2. Red-necked Grebe. 
» 
• 
0 
i 
0 
0 
X 
0 
# 
9, 10 
3. Horned Grebe.... 
• 
• 
0 
0 
0 
X 
0 
0 
0 
9, 10 
4. Pied-billed Grebe.. 
• 
• 
• 
X 
0 
0 
X 
0 
0 i 
9, 10 
5. White Pelican. 
• 
• 
• 
0 
0 
0 
0 
X 
0 
9 
6 . Double-crested Cormorant.. 
• 
• 
• 
X 
* 
• 
X 
0 
0 
9 , 10, 11 
7. Great Blue Heron. 
• 
♦ 
• 
X 
0 
X 
« 
0 
0 
8 , 9, 11 
8. Green Heron. 
« 
• 
0 
• 
0 
0 
0 
0 
X 
9. American Bittern. 
• 
• 
0 
X 
0 
0 
0 
0 
0 
8 , 9 
10. Whistling Swan .. 
• 
0 
. 
0 
0 
. 
X 
. 
9 
11. Canada Goose . 
• 
• 
« 
. 
0 
X 
0 
0 
. 
9 
12. Snow Goose ... 
• 
0 
• 
. 
0 
0 
X 
0 
. 
13 . Blue Goose .. 
• 
0 
0 
0 
0 
« 
0 
X 
0 
9 
13 
