Such complicated objects must have been designed. Living things are more complicated than computers. Living things must have been designed. God must exist. God must have a designer.
All animals are forms of life.
Therefore, all birds are forms of life. I am going to let go of my keys, so they will have to fall to the ground. It does not attract any other metals, so it is not magnetic. He is not a theist, so he must be an atheist. Sure this all seems pretty simple, but you'd be surprised just how often and easily people can mess these up.