Green Dinos, or Parasaurolophus cyrtocristatus, are an original species on the site as well as being among the first creatures ever released on Dragon Cave during its inception on May 21, 2006. Dinos are a special release of as opposed to the traditional dragons found on the site; they do not possess genders and cannot breed. They also cannot be revived if killed. Dinos come in 5 colors: Green, Red, Blue, Yellow and Purple. Purple Dinos are the only color not considered an original species of Dragon Cave, having been instead introduced on July 15, 2009.