The Floreana Mockingbird or Charles Mockingbird (Nesomimus trifasciatus) is a bird species in the family Mimidae. It is endemic to Floreana, one of the Galápagos Islands of Ecuador; at present it only occurs on offshore islets however.

Its natural habitat is subtropical or tropical dry shrubland.

Formerly classified as a Endangered species by the IUCN, recent research shows that its numbers are decreasing more and more rapidly, and it is on the brink of extinction. It is consequently uplisted to Critically Endangered status in 2008.