At a park near my house, there are these worms on the edges of the needles, crawling on them. What are they?

Question

They are a greenish grey color, small black head, two black shiney eyes, whitish stripe on there sides running down there backs. Black spots under neighth the lines. The worms are about and inch, to an inch an a half long. They are about 1-2 centemeters wide or so. They hang on the needles on the pine trees. If you scare them, they move the first half of their body curled. I found them today, around the middle of June. What are these nastey, little annoying creatures?

( But they are kinda cute though! )

Answer 1

They may be catipillars http://bugguide.net/index.php?q=search&k...