There are four types of animal communication: visual, acoustic, chemical, and electrical.
Visual communication is the most common type of animal communication. It includes body language, such as posturing and gestures, as well as facial expressions and eye contact. Acoustic communication is another form of visual communication that uses sound to communicate. Chemical communication uses pheromones, or scent signals, to communicate. Electrical communication is the least common form of animal communication and occurs between animals that have electroreceptors, or sensory organs that detect electric fields.