The taxonomic position of the Bananaquit (Coereba flaveola) is uncertain. Some authorities place it in the Thraupidae, while others (such as the AOU) classify it in its own family. I will follow the latter decision. The Bananaquit is relatively common in the Americas.
Genetic analyses of birds from the Caribbean region showed three intriguing patterns: (1) island to mainland colonization, (2) multiple expansions, and (3) mitochondrial genome replacement. The third observation refers to the recent replacement of mtDNA in birds on Hispaniola due to introgression from Jamaica (Bellemain, Bermingham & Ricklefs, 2008).
Bellemain, E., Bermingham, E. & Ricklefs, R. E. (2008). The dynamic evolutionary history of the bananaquit (Coereba flaveola) in the Caribbean revealed by a multigene analysis. BMC Evolutionary Biology 8.