Solitary vireo may refer to:
- Cassin's vireo, Vireo cassinii, endemic west of the Rocky Mountains from southwestern Canada to California, United States
- Plumbeous vireo, Vireo plumbeus, endemic east of the Rocky Mountains from southwestern Montana, United States to western Mexico
- Blue-headed vireo, Vireo solitarius proper, endemic to Canada east of the Rocky Mountains to northeastern United States
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