1. Gray Wolf (Canis lupus) Their presence influences the structure and dynamics of the ecosystem, promoting biodiversity.
2. American Beaver (Castor canadensis) Ecosystem engineer; creates ponds and wetlands through dam-building, which provide habitats for numerous species.
3. American Bison (Bison bison) Grazers that help maintain grasslands by aerating the soil and dispersing seeds through their waste.
4. Bald Eagle (Haliaeetus leucocephalus) Apex predator and scavenger; helps control fish and bird populations and cleans up carrion.
5. Monarch Butterfly (Danaus plexippus) Indicator of environmental health and key species for monitoring climate change effects.
6. California Sea Otter (Enhydra lutris nereis) Their presence maintains the balance of the coastal marine ecosystem.
7. American Alligator (Alligator mississippiensis) Apex predator in freshwater ecosystems; helps maintain the balance of aquatic animal populations.