We have a sticky here somewhere about general legality of slingshots in various states, but how about one in this section specifically dealing with slingshot hunting?
I'll start. Arizona: slingshots are legal for hunting the animals listed under the Slingshot column (3rd from right) on page 97 of This Document. No restrictions on the types of slingshots or ammo that can be used.
edit: Could also include slingshot hunting laws from other countries, as well.
I'll start. Arizona: slingshots are legal for hunting the animals listed under the Slingshot column (3rd from right) on page 97 of This Document. No restrictions on the types of slingshots or ammo that can be used.

edit: Could also include slingshot hunting laws from other countries, as well.