Perception and Response

In many species, specific behaviors are similar despite isolation and upbringing. A clear example of this is, for instance, birds nest construction and Spiderwebs. Highly complex patterns of behavior for the species, that they don't seem to require communal learning to perform.

Fighting behavior and maternal behavior to a big degree is highly reproducible among the members of a given species.

Behavior normally don't appear without a cue, something that triggers a specific response. That most likely is genetically ingrained. Thus senses appear to held the clue for advanced behavior.

Senses transduce the signals of the environment into something the central nervous system of animals can interpret.