If the hen does not have a blue eye ring, she is either a Cornelia's, Riedel's, Grand, or Vosmaeri's. Now, if the hen is almost entirely red with no purple or blue, she is Cornelia's or Riedel's. Cornelia ' have red under tail coverts while Riedel's have yellow. If the hen has purple or blue, she is a Grand or Vosmaer's. The distinctions between these two are clear when taken as a whole, but difficult to describe in a way that makes positive identification possible.
Grands are slightly smaller and their tail feathers and under tail coverts are red with yellow tips.
Vosmaer's have tail feathers with wide yellow bands at the tips and more yellow on the under tail coverts. All rights reserved.