Yellow Dinos, or Diplodocus carnegii, are an original species on the site, having been released on June 19, 2007, alongside Storm Dragons and Red Dinos. 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.