What are those really tiny, red bugs that you can sometimes see on rough, stoney surfaces?

Question

When I say tiny, I mean really, really tiny.

Answer 1

Images really help you ID, what you have seen so -

http://www.insectimages.org/

http://bugguide.net/node/view/15740

http://greennature.com/article1899.html

http://www.einsteins-emporium.com/life/a...

http://www.whatsthatbug.com/

Answer 2

Chiggers or mites or first stage ticks or very young spiders.  There are many insects and bugs that are small and red or have very small red young.

Answer 3

Ive seen them. My son makes me look. I'll tell you what I tell him, I dont know. :)