Dogwoods primarily rely on bird dispersal for their seeds. Here's why:

* Attractive Fruits: Dogwood trees produce bright red berries that are highly attractive to birds.

* Seed Structure: The seeds within the berries are small and encased in a fleshy, nutritious pulp that birds readily consume.

* Seed Viability: The seeds pass through the bird's digestive system unharmed and are deposited in droppings, often far from the parent tree.

While some dogwood species may also have limited dispersal by other means like wind or water, bird dispersal is the most significant method for these trees.