| Educator Supplement | X |
 |
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| Photo Essay | X | |||||
| Background Information | X | |||||
| Habitat Slides (all sites) | ||||||
| Aerial Photography | 1938 | 1954 | 1979 |
2005 2005 Chicago |
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| Satellite Imagery |
Natural Color 2007 Color Infrared Black &White |
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| Habitat Maps | 1938 | 1954 | 1979 | 2005 | ||
| Topographic Maps |
1:24,000 1:24,000 Chicago |
1:100,000 | 1:250,000 | |||
| Land Cover Maps | 1938 | 1954 | 2005 | |||