An alder is a type of tree that grows near water, especially along streams, rivers, and wetlands. Alders have smooth gray bark and oval leaves with jagged edges. They thrive in wet soil where many other trees struggle to survive, and their roots help prevent erosion by holding riverbanks in place.

These trees play an important role in nature. Their roots contain special bacteria that take nitrogen from the air and convert it into nutrients that enrich the soil, helping other plants grow nearby. Beavers love alder wood for building their dams, and many birds nest in alder branches that hang over water.

Alder wood has practical uses too. It's soft enough to carve easily but becomes surprisingly durable when kept wet, which is why it was once used for underwater foundations and water pipes. Today, woodworkers value alder for making furniture and guitar bodies because it's smooth and takes paint or stain beautifully. Alder wood also produces excellent smoking chips for cooking fish, giving it a mild, slightly sweet flavor.

If you're hiking near a stream and see trees with dark, cone-like structures hanging from their branches (these are seed pods, not true cones), you've probably found alders marking the water's edge.