For the more information about the geologic resources of the National Park Service, please visit

Impacts Affecting Migratory Species

Air Pollution Logging Mud Snails Hunter check-in.
Factors that may impact migration.

Migratory species are especially vulnerable to impacts because they use different habitats at different times of year and also require connecting travel routes. Many of the factors affecting and diminishing migration are familiar:

  • Habitat loss and fragmentation, which limits the seasonal movements of animals and contributes to genetic loss
  • Environmental contaminants, such as lead, pesticides, and herbicides
  • Exotic invasive species, which may consume food resources, prey upon, or otherwise impact native wildlife
  • Climate change

Share and Share Alike

Preserving migratory species in our national parks requires collaboration with other federal agencies, private landowners, non-government organizations, and even other countries. Here are examples of international travelers:

Broad-tailed Hummingbird Hatching Sea Turtles Sea Lions
Broad-tailed Hummingbird Sea Turtles Elephant Seals
Tundra Swan Killdeer Gray Whale
Tundra Swan Killdeer Gray Whale

Last Updated: February 26, 2016