Impacts Affecting Migratory Species

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	Sea Turtles	Sea Lions
Tundra Swan	Killdeer	Gray Whale