Rhea americana

Common name: Greater Rhea
Family: Rheidae

Greater rhea (Rhea americana) © Claudney Neves | Wikimedia Commons

Rhea pennata – Lesser Rhea
Hybrid origin of artificially incubated eggs was confirmed with genetic testing (Delsuc et al. 2007).

References
Delsuc, F., Superina, M., Ferraris, G., Tilak, M. K., & Douzery, E. J. (2007). Molecular evidence for hybridisation between the two living species of South American ratites: potential conservation implications. Conservation Genetics, 8(2), 503-507.