1. Eggs and Egg Cases
2. Pupae and Exuviae
3. Parasitism, Predation, and Other Causes of Death
4. Sign on Vertebrates
5. Droppings, Secretions, and Protective Coverings without Foreign Materials
6. Webs and Other Silken Constructions
7. Cocoons
8. Coverings, Cases, Retreats, and Nests Made from Foreign Materials
9. Sign on Algae, Fungi, and Plants
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10. Leaf Mines
11. Leaf Shelters
12. Galls
13. Sign on Twigs, Stems, and Stemlike Structures
14. Sign on and in Wood
15. Sign on Rocks and Shells
16. Burrows and Mounds
17. Molelike Excavations and Simple Surface Trails
18. Tracks and Trails
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