Spider bots - Ugh!

Following my nasty bug experience yesterday - an article I was reading in the Metro this morning made me shudder.
In the era of Nano-technology, the US military is investing millions into the development of tiny spy-bots in the form of spiders, flying bugs and even squashy caterpillar type things.
A very clever concept because these bug bots can get into the most remote of places without being noticed, and give soldiers a good view of the site without putting them at risk.
Still, the pictures of the things look so realistic that it makes the skin crawl.