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Apparently there are tree pruning machines with a similar design: https://youtu.be/CpdZyJ0Y1jE?t=472

The walking tree harvester, called PlusJack, was a development project by Timberjack (now part of John Deere) revealed in 1999.

The machine never entered production due to high manufacturing and maintenance costs, as well as the speed at which it could cover ground.

The prototype is now housed in The Museum of Lusto [1] in Finland (near bottom of page for pictures).

[1] http://www.unusuallocomotion.com/pages/museums/museum-of-lus...

Deere / Timberjack was beaten out by Ponsse.[1] Four wheels, two caterpillar tracks, and an articulated chassis. Probably lower ground pressure than the six-legged machine, because the heavy loads are on wide tracks.

[1] https://www.youtube.com/watch?v=daCCTuaiY0Q

The komatsu machine that plucks the tree up and shreds the branches looks like something a transformers villain would be made of.

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