Supposedly it's only the females that suck blood. They hang out in the grass until some warm blooded animal happens by. Then they go for a ride, find a spot to nestle down (usually behind some animal's ear or something), and gorge themselves on blood. The get so full they can't hold on anymore, and they fall off and lay eggs somewhere.
It sounds like a pretty boring existence.
And as much as I dislike ticks in general, if you ever just look at one tick, it's kind of fascinating.
I have a job that gets me off the main trail. And sometimes, if I slow down and look around instead of trudge through to get from one spot to the next, I get a chance to see something really interesting.
I noticed somehow out of the corner of my eye a tick in the grass. As I got closer this tick, only a few millimeters in size (well, the size of a tick), I saw that it started to reach out with its arms... or a couple of its legs... you know what I mean.
Of course I didn't have a camera with me that first time, so these photos are staged. But you have to admit, it's kind of cool... in a weird and creepy way.