They are two different species. There are several species of "dragon" in Australia. Pagona viticeps is the "inland" bearded dragon. Pogona henrylawsoni is the Rankin or Lawsons dragon. They are much smaller than the bearded dragon seen in the pet trade.
Mirage came out of brumation on April 26. He was doing great. On May 2 he started acting funny. We just redid his tank, and he keeps going into one of his hides. He just lays there. He shows no intrest in food. HELP!