It is arbitrary to use the name Vogelkop as a Biak dialect. Vogelkop is the Dutch name for Bird's Head. As you may know Bird's Head is a large region counting numerous languages and dialects. Probably Biak is spoken somewhere, but to name it "Vogelkop" is like naming "Europe" as a dialect of the English language
This dialect name for Biak [bhw] will be removed for the 18th edition.