couldn't tell you who the accepted authorities are or even if there is one (cornell is my guess bna.birds.cornell.edu/BNA/account/Yellow-crowned_Night-Heron/bib/index.html), but i would go with the most recent journal citation that seems to have others citing it as a reference (that aren't refuting it). taxonomy is being rewritten rapidly these days due to genomic research, and a taxonomic record from just a few years ago could potentially be out of date. and just because some scientists says it's one thing, doesn't mean everyone agrees. taxonomy is a hot topic these days, and except for those in the specific field, i'm not sure it matters.

here's a list of journals to get ya started :):

http://www.nmnh.si.edu/BIRDNET/period.html