- Birds of prey, such as hawks and falcons
- Owls
- Snakes
- Squirrels
- Chipmunks
- Jays
- Magpies
- Starlings
- House sparrows
- Grackles
These predators may primarily target mountain bluebirds and their eggs or young. Mountain bluebirds can employ various nesting strategies, such as choosing locations in cavities or crevices, to minimize predation risks.