Roots trap sand and other sediment to help other trees grow in the wetland. Roots also prevent erosion. Birds and insects are protected in the cover of willow. Rats, birds and rabbits eat willow twigs. When animals overeat willow branches, the shoots that grow in their place are inedible.
Willow branches are bendable and used to make baskets and furniture.
The bark is used for twine and dye. Native Americans chewed willow bark for pain relief since it contains a chemical similar to aspirin. Those thorns protect small animals hiding in the tangle of blackberry branches. The branches grow quickly. This shrub can grow roots from the branches when the branch is in a wet area.