The Ovenbirds are a large family of small suboscine passerine birds found in Mexico, Central and South America. Hybridization has been documented in several genera.
The Rufous-capped Spinetail (S. ruficapilla) and the Bahia Spinetail (S. cinerea) form a secondary contact zone in Brazil. Gene flow mainly occurs from the Bahia Spinetail into the Rufous-capped Spinetail (Batalha-Filho et al., 2019).
While investigating the phylogeographic history of the Buff-browed Foliage Gleaner (Syndactyla rufosuperciliata), a study uncovered gene flow between this species and the Russet-mantled Foliage-gleaner (Syndactyla dimidiata) in Paraguay and Brazil (Cabanne et al., 2019).
At Amazonian headwaters, hybrids between subspecies of the following species have been confirmed genetically (Weir et al., 2015): Plain-brown Woodcreeper (Dendrocincla fuliginosa), Elegant Woodcreeper (Xiphorhynchus elegans) and Wedgebill Woodcreeper (Glyphorhynchus spirurus). Reproductive isolation between Elegant Woodcreeper subspecies is mainly driven by postzygotic isolation (Pulido-Santacruz et al. 2018).
Batalha-Filho, H., Maldonado-Coelho, M., & Miyaki, C.Y. (2019). Historical climate changes and hybridization shaped the evolution of Atlantic Forest spinetails (Aves: Furnariidae). Heredity, 1.
Cabanne et al. (2019) Phylogeographic variation within the Buff-browed Foliage-gleaner (Aves: Furnariidae: Syndactyla rufosuperciliata) supports an Andean-Atlantic forests connection via the Cerrado. Molecular Phylogenetics and Evolution, 133: 198-213.
Pulido-Santacruz, P., Aleixo, A. & Weir, J.T. (2018) Morphologically cryptic Amazonian bird species pairs exhibit strong postzygotic reproductive isolation. Proceedings of the Royal Society B, 285:20172081.
Weir, J. T., Faccio, M. S., Pulido-Santacruz, P., Barrera-Guzman, A. O. & Aleixo, A. (2015). Hybridization in headwater regions, and the role of rivers as drivers of speciation in Amazonian birds. Evolution 69, 1823-1834.