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Tracks & Sign of Insects and Other Invertebrates
Field Guide updates, additions, corrections. Ongoing...
( taxa covered )
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

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

To request an ID for a gall, or to see images of galls that have us stumped, please visit this page. Clicking the gray "Info" tab there will take you a page with links to BugGuide's pages for the major groups of gall-forming insects and mites.
p. 388 The illustrated grape midge galls were caused by Vitisiella brevicauda. Click here to see photos of a larva and adult of this species.
p. 390 It seems to be safe to call the wasp that induced the oak pea gall in this photo Acraspis pezomachoides. There are several similar galls produced by wasps that were once considered separate species but are now treated as varieties of this species.

Images ©Charley Eiseman/Noah Charney