you need an area that "funnels" critters into your trap, or bait. Such funnels can be made,but it's a lot of work. Woven wire fence can be overlapped, used to make box traps, for fish, turtles, birds, critters. It protects the catch from predators, and it can, in some cases, catch more than one bird or fish. You want to read Ragnar Benson's Survival Poaching book.