The content of this tutorial doesn't have to be followed precisely, its just how i did things and it turned out well.

First you need to go gathering materials. I used Hazel wood. Choose the thin long shoots of wood which i would think are a couple of years old. You don't have to use hazel, There should be plenty of other wood types you can use. I can imagine Willow would work well but you could even use things like Alder whips.

Once you have got the wood you can strip the bark off and tie them together into small bundles and let them dry. Hazel dried for me over night on top of a hot radiator! The wood suffered no splitting.

Keep a hand full of wood fresh for the next stage though because its easier to bend when fresh.

Next you need to make some hoops which will be part of the basic frame of your trap. With some wood that is still fresh, gradually work it in your hands to make it more flexible, then begin to shape into hoops. Like so: Wrap string around them to hold them in place. Now leave them to dry and when all the moisture in the wood is gone they should keep their shape.

I used a total of 6 hoops in the frame of my trap.

Once they are dry and solid you can taper the ends so that they fit together nicely. Then bind them to create a nice hoop. I used Lime bark to bind mine. Its easier said that done as you might find out!