there are some bugs really good in Camouflage... you will never notice them if you not really spend some effort to look for it ... but not all of them are difficult to spot and below are some my found which I feel ...we need good patience and "eye" to look for it ....
1. always stick on tree body
2. leaf look alike ...
3. very small insect always hide on tree body which same color
4. always on the rock .. same color :D
5. this is one real tough one . small and 95% same color with the tree ...and seldom move
6. not really toght but not easy too
7. so far .. this is most difficult to spot spider .. I keep look for it within the same tree ...
8. this mantis love to go into plant with color with white .. and patient need to spot it ..
9. if this guy drop into the leaf area .. don;t think we can easy to find it