The Esmeraldas Woodstar, Colibri De Berlepsch, ColibrÍ De Esmeraldas, or Estrellita EsmeraldeÑA (Chaetocercus berlepschi) is a species of hummingbird in the Trochilidae family. It is found only in Ecuador. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss.