Coastal forests of eastern Brazil from southern Bahia south to eastern Santa Catarina.
 
Population
Estimated population is unknown (2010) and decreasing.
Status NT
Habitat destruction and degradation through urbanisation, industrialisation, agricultural expansion, colonisation and associated road-building, are the main threats.
For more information see BirdLife International Species Factsheet.
Oustalet's Tyrannulet (Phylloscartes oustaleti) [XC332862]
by Jerome Fischer from Intervales State Park. Carmo road, Brazil (call, song)
Oustalet's Tyrannulet (Phylloscartes oustaleti) [XC41895]
by Jeremy Minns from Agri\u00e3o, Parque Nacional da Serra do Itaja\u00ed, Presidente Nereu, Santa Catarina, Brazil (song)