Wilsonia (bird)

Wilsonia was a formerly recognized small genus of New World warblers. The species previously included in the genus breed in North America and are migratory, wintering south of their breeding ranges in Central America, the West Indies or South America.

The three species formerly included in Wilsonia, all since transferred to other genera, are:

• Hooded warbler, now Setophaga citrina
• Wilson's warbler, now Cardellina pusilla
• Canada warbler, now Cardellina canadensis

Former Wilsonia warblers are 12–13 centimetres (4.7–5.1 in) long. They have yellow underparts and black head markings in at least the adult male plumage. The hooded warbler and Wilson's warbler have plain olive green-brown backs, while the Canada warbler has grey upperparts and also migrates much further than the others.

The breeding habitat is broadleaved woodlands with dense undergrowth. These birds nest low in a bush or on the ground, laying 3–6 eggs in a cup nest.

Former Wilsonia warblers feed on insects, often caught by flycatching, and they have distinctive songs and loud chip calls.