I think this is the first record of this species in Vietnam. - DST
Taxonomic Notes :
Monotypic. Note that the form formosanus, which was formerly treated as a subspecies of Vinaceous Rosefinch, is now considered a separate species as Taiwan Rosefinch Carpodacus formosanus.
Wu, H.-C., Lin, R.-C., Hung, H.-Y., Yeh, C.-F., Chu, J.-H., Yang, X.-J., Yao, C.-J., Zou, F.-S., Yao, C.-T., Li, S.-H. and Lei, F.-M. (2011) Molecular and morphological evidences reveal a cryptic species in the Vinaceous Rosefinch Carpodacus vinaceus (Fringillidae; Aves). Zoologica Scripta 40: 468–478
Tietze, D. T., M. Päckert, J. Martens, H. Lehmann & Y.-H. Sun (2013) Complete phylogeny and historical biogeography of true rosefinches (Aves: Carpodacus). Zool. J. Linn. Soc. 169: 215-234