Never seen a saw like this before, I assume this is what it is, due to the logs. Oh dear, seen a saw ..lol

I guess it's a 'shredder' judging from the pile of debris in the background. Although, it could be a mobile saw to make boards :)

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Darn, I'm getting dim, never thought of that! now you've said it, it looks so obvious! 8-(

I still think it's a saw. Look beyond that thingie .. all that sawdust ... :)

I think its a shredder or mulcher too. They use them to make wood, bark and leaf mulch from the green leaves and smaller branches not used for milling. Landscape gardeners use the stuff by the bag full. You can get mini mulchers in hardware stores.