For the more information about the geologic resources of the National Park Service, please visit http://www.nature.nps.gov/geology/.


Ecological Roles of Migratory Species

Migratory species may have strong ecological influences and fulfill important ecological roles, including:


Eagle Bison and Elk Elk
Predators Grazers Prey
     
Monarch Butterfly Band Tail Pigeon  
Pollinators Seed Dispersers  

Last Updated: December 17, 2010