The Esmeraldas Woodstar , ( Chaetocercus berlepschi ) is a species of hummingbird . The Esmeraldas Woodstar , Colibri De Berlepsch , ColibrÃ De Esmeraldas , or Estrellita EsmeraldeÃ ` A ( Chaetocercus berlepschi ) is a species of hummingbird in the Trochilidae family .