Stick Insect.
About 20 years ago I took this photo of a stick insect. I sold the only print that I made to the Auckland Art Gallery and since then I have not been able to find the negative, thereby making it a very rare image. To my knowledge it has never been reproduced. The Auckland Art Gallery is possibly unique among New Zealand public galleries in that it has its collection on-line. Here is a link to the opening page, although it does require you to click a box saying that you accept the conditions of browsing through it.
When I took this photo I was particularly interested in camouflage.