What is an indicator that a tree may be unhealthy?

Discolored or wilting leaves serve as a clear indicator that a tree may be unhealthy. Healthy trees typically exhibit vibrant green foliage, which is essential for photosynthesis and overall vitality. When leaves become discolored—showing shades of yellow, brown, or spotting—or begin to wilt, it suggests that the tree may be experiencing stress or illness. This can occur due to a variety of factors, including inadequate water supply, pest infestations, diseases, or poor soil conditions.

In contrast, bright green leaves usually signify a healthy tree, as they indicate good photosynthetic activity. Nesting birds may suggest that the tree is part of a healthy ecosystem, serving as a habitat for wildlife. A high canopy typically denotes that a tree is mature and thriving, as it has grown sufficiently tall and strong to reach above competing vegetation. Therefore, discolored or wilting leaves stand out as a critical sign of potential health issues within a tree.