I don't know what sort of wood it was, I used old stuff that was just hanging about. I don't throw away wood as it always comes in useful. I used to use old pallets, broken up, but I am a bit posher now as I have what has been left over from the building work. I don't need a sledge myself, I have a snowtrac which doesn't get any snow, so why would I need a sledge? Actually I think they are all snow deterrants!
I am now in the process of building my daughter a bird table. My Dad built a lovely bird table for himself and one for my Uncle. I inherited them and had to replace a lot of rotten wood, both are now up and in use. I then built one for my neighbours as a Christmas present (about four years ago), but they still haven't got round to putting it up. Pictures of my Dad's bird table accompany this post (posh way of putting it!)