The Stick Insect (Phasmatodea [aka Phasmida or Phasmatoptera]) are extremely difficult to spot, due to their natural camoflage. While the Stick Insect I found in my bathroom in Kenya was of imaginable size, the specimen found in Zanzibar was enourmous. I calculate it was around 18" (46cm) long. Stick Insects are born in leaf litter, on the forest floor and eat during the day. As they grow older, their eyes change and have an aversion to strong light. They then become nocturnal, making them even more difficult to spot.