There are a few WA endemic dragons.
I am tempted to determine a description, but I'll have a wild guess first, as it came straight to mind - the Mulga Dragon Diporiphora amphiboluroides.
I definitely agree with the one guess at a time, otherwise they have NOT got it right in my book. (So multiple guesses should be directed to choose one of.)
Similar thing with only being given one clue at a time. It's the only fair way to run it. And it works out more fun that way!