The Lord Howe Island stick insect disappeared from the main island soon after the accidental introduction of rats when the SS Makambo ran aground near Ned's Beach on 15 June 1918. In 2001, a tiny population was discovered in a single Melaleuca howeana shrub on the slopes of Ball's Pyramid, has been successfully bred in captivity, and is nearing re-introduction to the main island. The Lord Howe stag beetle is a colourful endemic beetle seen during summers. Another endemic invertebrate, the Lord Howe flax snail (or Lord Howe Placostylus), has also been affected by the introduction of rats. Once common, the species is now endangered and a captive-breeding program is underway to save the snail from extinction.