Аннотация:We investigated patterns of the evolution of vertebrates’ communication systems. These systems are subdivided into two groups corresponding to different levels of development of communication systems: motivation signals and referential signals. For motivation signals demonstrations proclaim the level of motivation and the subsequent behavior of an animal. For referential signals demonstration have the external reference and reflect different problematic situations that were generated in the interaction. They are «names» of these problematic situations and behavioral programs that resolve the given situation.