Caterpillar

Next to our house is some sort of empty field. Last week when I was walking there with the dog I saw something amazing. A few nests of those caterpillars with each of them over a hundred baby caterpillars. After I brought back home the dag I grasped my camera and went back to make some pictures of it. Here are some of the results. I really don't know the name of this caterpillar but if you do you welcome to share it with me!