The Serra Do Mar Tyrannulet (Phylloscartes difficilis) is a species of bird in the Tyrannidae family. It is endemic to Brazil. Its natural habitat is subtropical or tropical moist montanes. It is threatened by habitat loss.

Source

• BirdLife International 2004. Phylloscartes difficilis. 2006 IUCN Red List of Threatened Species. Downloaded on 26 July 2007.