(syn. Branta Ϯ Red-breasted Goose B. ruficollis) Gr. πτωκας ptōkas timorous, birds (i.e. timorous ones); "Genus Ptocas Heine  [Rufibrenta (!) Bp. 1856]" (Heine 1890).

Search for more names on the Key to Scientific Names in Ornithology by James A. Jobling.
Recommended citation
Jobling, J. A. (2019). Key to Scientific Names in Ornithology. In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.) (2019). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 21 January 2019).