Simple and effective trap that can be used for a variety of animals including birds, squirrels, chipmunks and other rodents. All you need is a cardboard box, a stick, and a string. In this case I used fishing line because it's hard to notice. The bird trap was baited with an assortment of bird seeds. In the past this trap has caught me squirrels, cardinals, and chipmunks. It is extremely effective and does not require many materials to construct.