In French Guiana, the nesting of the Rufous-tailed Flatbill (Ramphotrigon ruficauda) occurs during the main dry season from mid-July to the end of October.
This rain forest inhabitant nests exclusively at the bottom of cavities in the end of broken trunks or large fallen branches near the ground.
Three eggs are laid in a softly lined nest. Holenesting habits and choice of nest materials by Ramphotrigon ruficauda support the cloise phylogenetic relation of Ramphotrigon with the Myiarchus flycatchers.