Kiri-origami artist Taketori cuts and folds paper to make realistic-looking insects. Each critter is crafted from a single sheet, without glue, and paint is often used to add to the realism. Check out his gallery of 60+ beasties (click the "?????" link on the right side of the page to display the thumbnail images).
Lucanus maculifemoratus vs. Japanese rhinoceros beetle
Woodlouse on a hydrangea leaf
Ants vs. oriental longheaded locust