The Bananaquit, Coereba flaveola, is a passerine bird first described by Linnaeus in his Systema naturae in 1758 as Certhia flaveola.

It was reclassified as the only member of the genus Coereba by Louis Jean Pierre Vieillot in 1809.. Prior to 2005 the Bananaquit belonged to the monotypic family Coerebidae; there is currently no agreement to which family it belongs. The Coerebidae used to contain other nectar-eating birds from the tropical Americas, but these have since been moved. The Bananaquit is possibly close to some grassquits Tiaris but the precise phylogeny remains unresolved. The AOU thus classes it as species incertae sedis. It is resident in tropical South America north to southern Mexico and the Caribbean. It is a rare visitor to Florida, USA.

The Bananaquit is a very small bird attaining an average length of 11 cm. It has a slender, curved bill, adapted to taking nectar from flowers. It sometimes pierces flowers from the side, taking the nectar without pollinating the plant. It cannot hover like a hummingbird, and must always perch while feeding. It will also eat fruit and insects. It often visits gardens and may become very tame. Its nickname, the sugar bird, comes from its affinity for bowls or bird feeders stocked with granular sugar, a common method of attracting these birds in the USVI. Birds in the genera C?reba, Dacnis, and allied genera belonging to the family C?rebidæ, are all referred to as sugar birds.

The Bananaquit has dark grey upperparts, a black crown to the head and yellow underparts and rump. It has a prominent white eyestripe. The sexes are alike.

On Grenada and Saint Vincent, most Bananaquits have black plumage, suggesting divergence from other West Indian populations.

The Bananaquit builds a spherical lined nests with a side entrance hole, laying up to three eggs.

Bananaquit in its nest, Osa Peninsula, Costa Rica