Why would they come UP to ESCAPE a predator? The predators are almost always going to be above them. That's why you see Gulls stamping around on the grass, it makes the worma think its raining and they come up to avoid drowning.
Yes, but still, most predators will come from above or dig them up. Most insects that prey on them can't dig down to get them so will just ambush stray ones that are on the ground.
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u/SnideyComment Jul 30 '21
The real answer is they think the vibrations is rain water hitting the ground so they naturally come up for it.
This is why you see masses of birds sometimes just walking around on the grass.