Every forest owner or anyone interested in forests should be able to recognize the most important forest pests and identify their damage patterns. Assessing the damage thresholds and thus their danger to the forest is particularly important. However, this can only be accurately determined with knowledge of the biology of the pests. 250 color illustrations and detailed descriptions allow for easy and reliable identification of the damage patterns of around 100 insects, 30 fungi, and 10 small mammals. Pocket-sized: suitable for on-the-go use.