Pick a cheap double reed to begin with. They have natural rasp and tone that takes practice to mimic in a single reed. The downside is they aren't as fast to run or have the range top to bottom of a single, but they do sound "ducky" which will kill birds.
Some cheap ones I have used are Winglock, Echo and my favorite, the Let Em Lite Mrs H my buddy gave to my son. That thing sounds great, acrylic and cheap.
