Exquisite. I have the Hoffman & Brown, "Orchids of south-west Australia" . It looks like their "Ruby Spider Orchid", and could be called Cherry in localised areas. I am only going on pics in a book, so could be wrong. Caladenia occidentalis, botanical name. You are soo lucky to see these amazing flowers.
@ethelperry Thanks Ethel, I think you are right, I was only looking on a site I found on the Internet to identify it. I looked up Ruby spider and I'd say that matches pretty well. I don't think I had seen this one before and it was lone plant, it's quite fun searching for these rare beauties.