Taxon - Links and literature
Gill F., Donsker D. & Rasmussen P. (eds): IOC World Bird List 11.1 [http://www.worldbirdnames.org/] [as Polioptila facilis Zimmer, JT, 1942]Data retrieved on: 5 December 2021
Clements, J. F.: eBird/Clements checklist of birds of the world 6.7, Cornell Lab of Ornithology [as Polioptila guianensis facilis]Data retrieved on: 25 April 2013