FIGURES 
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Frontispiece. Isle Royale National Park, Lake Superior . 
Figure 1. Sugar maple-yellow birch climax forest type . ^ 
Figure 2. Spruce-fir-birch forest type and riparian brush . j 
Figure 3. Birch-conifer forest type . 
Figure 4. Spruce-fir-birch climax forest type (browsed by moose). 
Figure 5. Aspen-birch-conifer forest type . i 
Figure 6. American yew on Passage Island . 
Figure 7. Balsam fir on Passage Island ... 
Figure 8. Sand beach habitat . > 
Figure 9. Gravel beach habitat . i* 
Figure 10. Beaver pond habitat, 1936 burn. ^ 
Figure 11. Aquatic habitat of Ojibway Lake . £2 
Figure 12. Rock outcrop opening . ^ 
Figure 13. Bald eagle nest in white pine . 2fi 
Figure 14. Sharp-tailed grouse habitat . 2fl 
Figure 15. Herring gull . 31- 
Figure 16. Gull rookery on Siskiwit Islands . 33 
Figure 17. Gull nest with young birds hatching out. 33 
Figure 18. Old lighthouse on Menagerie Island . 34 
On the cover. Gray jay. 
Photographs are by the authors. 
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