Hi Costello,
We call those big ones dog ticks down south because they generally latch onto dogs that run freely in the woods. They get bigger when engorged with blood and fall off, bust open and voila' thousands of seed ticks. As a girl running through the thick woods they would rub off on me off a bush I would brush up against. I would feel some thing on one of my limbs there would be this dark spot that would began to spread over my skin, thousands of them. At that point all I could do was brush furiously. My Momma would make a concoction of suffer cream of tarter and lotion to ward them off. But I would have to grease up with that often because of sweating it off in that humidity. gay~ta~ween~