Argentina, Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Paraguay, Peru, Suriname, Trinidad and Tobago, Venezuela.
Northern and eastern Colombia and northern and central Venezuela east to Trinidad and the Guianas, southern irregularly to eastern Ecuador, north-eastern Peru, northern and eastern Bolivia, northern Argentina, Paraguay and south-eastern Brazil.
 
Rarity Status
Currently this species is not classified as a rarity in this country OR information has not been updated.
Population
Estimated population is unknown (2010).
White-headed Marsh Tyrant (Arundinicola leucocephala) [XC723576]
by Dante Buzzetti from Marina de Roura, French Guiana (song)
White-headed Marsh Tyrant (Arundinicola leucocephala) [XC524346]
by JAYRSON ARAUJO DE OLIVEIRA from Setor Samambaia, mata seca, perto da UFG-Agronomia, Goi\u00e2nia-Goi\u00e1s, Brazil (song)
Subspecies
No subspecies.
Genus related to Fluvicola and sometimes merged with it. However, anatomical evidence and behaviour suggest that separate generic treatment is more appropriate.