Belongs within: Thraupidae.
The bananaquit Coereba flaveolens is a Neotropical passerine with a distinctive slender, sharply pointed, decurved bill (Hilty 2011).
Characters (Hilty 2011): Bill short, sharply pointed and decurved. Generally dark grey to dusky olive above, much brighter on rump, with prominent pale supercilium, white patch at base of flight feathers; throat greyish, underparts bright yellow. Sexes more or less alike. Immature similar to adult, but paler and dingier, with supercilium dull, often yellowish, or with anterior portion yellow and posterior portion white; immatures of sooty races similar to adults, but duller and browner.
<==Coereba Vieillot 1809H11 [=Caereba (l. c.)B94; incl. Arbelorhina Cabanis 1847B94; Arbelorhinidae, Coerebinae, Coerebini]
`--*C. flaveola (Linnaeus 1758)B94 [=Certhia flaveolaH11, Nectarinia flaveolaB94]
|--C. f. flaveolaH11
|--C. f. alleni Lowe 1912H11
|--C. f. aterrima (Lesson 1830)H11
|--C. f. atrata (Lawrence 1878)H11
|--C. f. bahamensis (Reichenbach 1853)H11
|--C. f. bananivora (Gmelin 1789)H11
|--C. f. barbadensis (Baird 1873)H11
|--C. f. bartholemica (Sparrman 1788)H11
|--C. f. bolivari Zimmer & Phelps 1946H11
|--C. f. bonairensis Voous 1955H11
|--C. f. caboti (Baird 1873)H11
|--C. f. caucae Chapman 1914H11
|--C. f. cerinoclunis Bangs 1901H11
|--C. f. chloropyga (Cabanis 1851)H11
|--C. f. columbiana (Cabanis 1865)H11
|--C. f. dispar Zimmer 1942H11
|--C. f. ferryi Cory 1909H11
|--C. f. frailensis Phelps & Phelps 1946H11
|--C. f. gorgonae Thayer & Bangs 1905H11
|--C. f. guianensis (Cabanis 1851)H11
|--C. f. intermedia (Salvadori & Festa 1899)H11
|--C. f. laurae Lowe 1908H11
|--C. f. lowii Cory 1909H11
|--C. f. luteola (Cabanis 1851)H11
|--C. f. magnirostris (Taczanowski 1880)H11
|--C. f. martinicana (Reichenbach 1853)H11
|--C. f. melanornis Phelps & Phelps 1954H11
|--C. f. mexicana (Sclater 1857)H11
|--C. f. minima (Bonaparte 1854)H11
|--C. f. montana Lowe 1912H11
|--C. f. nectarea Wetmore 1929H11
|--C. f. newtoni (Baird 1873)H11
|--C. f. oblita Griscom 1923H11
|--C. f. obscura Cory 1913H11
|--C. f. pacifica Lowe 1912H11
|--C. f. portoricensis (Bryant 1866)H11
|--C. f. roraimae Chapman 1929H11
|--C. f. sanctithomae (Sundevall 1870)H11
|--C. f. sharpei (Cory 1886)H11
|--C. f. tricolor (Ridgway 1884)H11
`--C. f. uropygialis Berlepsch 1892H11
*Type species of generic name indicated
References
[B94] Bock, W. J. 1994. History and nomenclature of avian family-group names. Bulletin of the American Museum of Natural History 222: 1–281.
[H11] Hilty, S. L. 2011. Family Thraupidae (tanagers). In: Hoyo, J. del, A. Elliott & D. A. Christie (eds) Handbook of the Birds of the World vol. 16. Tanagers to New World Blackbirds pp. 46–329. Lynx Edicions: Barcelona.