Sawfly larvae take the tissues out from between the upper and lower surfaces of the leaves. They are fairly common on bur oaks, but they are of no particular concern.

A team of deep sea explorers with the Schmidt Ocean Institute found a “fantastic” spiral on a square block off the coast of ...

Instead, it was the work of a worm, which was still there, hanging out on the edge of the rock, the video shows. This larger image shows the acorn worm was still at the corner of the rock ...

And that spiral was actually a very long trail of its poop, marine biologists say. They are known as acorn worms, or “spiral poo worms,” and their claim to fame is pattern pooping, scientists say.