Over the millennia plants have found many ways to travel as seeds. They have found ways to make use of natural forces, such as water and wind. They have also learned to travel with animals and birds. The seeds of land plants vary widely in size and shape. Animal Power Some flowering plants package their seeds in fruits and berries.
Many small berries keep well on the branches and become food for birds in winter.
The small seeds are hidden in the berry pulp. The birds swallow the berries whole and the seeds pass through their digestive tracts. Birds often transport small seeds in this way. Some plants produce large, sweet, perishable fruits. These fruits are fragrant, and attract tree climbers, like raccoons, as well as grazing animals.