From a distance, the brilliant colors of autumn leaves make an inspiring sight. However, a closer view is often not so pretty. Many of the leaves that I saw on my walk were marked by bacterial, fungal, and viral diseases.
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| Infected maple leaves. |
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| Infected oak leaves. |
Other leaves had been skeletonized by insects while still on the trees. Interestingly, the leaves that had been consumed in this way were often attached to a neighboring leaf, perhaps forming a shelter for the hungry herbivores.
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| One of many skeletonized oak leaves. |
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