Why do you bother to contact such a primitive species? These humans think of ants the same way as how we think of humans to us. They are not even a type 1 civilisation and we are type 3. After studying the planet, it is the Dolphins which we regard as the most intelligent species. The elephants are close behind. We hang around and are making contact with these species and are watching the planet to protect them from the dangerous ape specie which thinks it is intelligent and thinks it owns the planet. Little does man know but we were here first.