I had not seen this before. Deforestation opponents aren't going to be happy.
Here is a tractor that doesn't have wheels -- a logging tractor, built to WALK over the forest floor, to collect logs. Apparently it can go in any direction, turn in place, manage graded terrain.
More info, more pics, and two videos
Actually maybe the deforestation people are happy after all. A device like this would make it economically viable to only cut selected trees in a forest, rather than just clear-cutting. Also, maybe it allows them to selectively forest without having to cut down wide paths of trees for logging roads.