Whose hairy knees are these?

A busy, busy day- cleared the garden, packed away the paddling pool (summer has gone on vacation I think!). As I moved some plastic sheeting this monster ran at me! I collected him to let the kids see - he was huge! Then as I released him he sat ever so still to pose for a few shots :)

How do I know its a he? Well- look at the hairs on those knees! Must be a bloke!!