- Tiny bird.
- Long tail.
- Bluish gray back.
- White underside.
- White eyering.
- White outer tail feathers.
- Small, thin bill.
- No wingbars.
Male DescriptionBreeding (Alternate) Plumage: Black line meeting over the bill and extending around head above the eyes to just behind the eyes. Crown and nape washed with bluish.
Nonbreeding (Basic) Plumage: Crown and nape medium gray. Face all medium gray.
Female DescriptionFace all gray, with white eyering. Overall paler gray than male.
Immature DescriptionSimilar to adult female, but wings slightly browner.