This junco is endemic to Guadalupe Island. It has a grayish head, white underparts and white outer tail sides, and forages in trees and on the ground.
It has a grayish head, brown upperparts, blackish wings and tail, white outer tail feathers, and white underparts.
It forages in trees and on the ground in oak-pine forest. A study describes patches of pine and Guadalupe cypress forest in the island's north as its suitable habitat.
An extinction-risk assessment has not been added yet.