Systematics
Similar to the situation in the Dark-eyed Junco, this species' systematics are still in need of much research before they can be considered resolved. Four subspecies groups are usually distinguished. These are, north to south:
- Mexican Junco, Junco phaeonotus phaeonotus.
- High mountains of Mexico, southeastern Arizona and southwestern New Mexico.
- Baird's Junco, Junco phaeonotus bairdi.
- High mountains of Baja California Sur
- Chiapas Junco, Junco phaeonotus fulvescens.
- High mountains of Chiapas, southeast Mexico.
- Guatemala Junco, Junco phaeonotus alticola.
- High mountains of eastern Chiapas (southeast Mexico) and Guatemala.
Read more about this topic: Yellow-eyed Junco