Antpittas occur in tropical and substropical Central and South America. Only two species are known to interbreed, namely Chestnut-naped Antpitta (Grallaria nuchalis) and Chestnut-crowned Antpitta (G. ruficapilla) (Cadena et al., 2007).
Cadena, C. D., Lopez-Lanus, B., Bates, J. M., Krabbe, N., Rice, N. H., Stiles, F. G., Palacio, J. D. & Salaman, P. (2007). A rare case of interspecific hybridization in the tracheophone suboscines: Chestnut-naped Antpitta Grallaria nuchalis x Chestnut-crowned Antpitta G-ruficapilla in a fragmented Andean landscape. Ibis 149, 814-825.