#perceiver__observer__beholder  a person who becomes aware (of things or events) through the senses
  supertype:  #person__individual__someone__somebody__mortal__human__human_being__humanbeing__soul  a human being; "there was too much for one person to do"
  subtype:  #eyeglass_wearer  a person who wears spectacles in order to see better
  subtype:  #finder__discoverer__spotter  someone who is the first to observe something
  subtype:  #hearer__listener__auditor  someone who listens attentively
     subtype:  #eavesdropper  a secret listener to private conversations
        subtype:  #phone_tapper__phonetapper__tapper__wiretapper  someone who wiretaps a telephone or telegraph wire
  subtype:  #audile  one whose mental imagery is auditory rather than visual or motor
  subtype:  #motile  one whose prevailing mental imagery takes the form of inner feelings of action
  subtype:  #noticer.perceiver  someone who takes notice; "a careful noticer of details"
  subtype:  #seer  an observer who perceives visually; "an incurable seer of movies"
  subtype:  #spectator__witness__viewer__watcher__looker  a close observer; someone who looks at something (such as an exhibition of some kind); "the spectators applauded the performance"; "television viewers"; "sky watchers discovered a new star"
     subtype:  #browser  a viewer who looks around casually without seeking anything in particular
     subtype:  #bystander  a nonparticipant spectator
     subtype:  #cheerer  a spectator who shouts encouragement
     subtype:  #eyewitness  a spectator who can describe what happened
     subtype:  #moviegoer__motion-picture_fan  someone who goes to see movies
     subtype:  #ogler  a viewer who gives a flirtatious or lewd look at another person
     subtype:  #onlooker__looker-on  someone who looks on
     subtype:  #playgoer__theatergoer__theatregoer  someone who attends the theater
        subtype:  #first-nighter__firstnighter  someone habitually a spectator at the openings of theatrical productions
        subtype:  #groundling  in Elizabethan theater: a playgoer in the cheap standing section
     subtype:  #rubberneck  a person who stares inquisitively
     subtype:  #spy  a secret watcher; someone who secretly watches other people; "my spies tell me that you had a good time last night"
        subtype:  #snoop__snooper  a spy who makes uninvited inquiries into the private affairs of others
           subtype:  #eavesdropper  a secret listener to private conversations
        subtype:  #shadower__tail__shadow  a spy employed to follow someone and report their movements
     subtype:  #standee  a spectator who uses standing room (as in a theater when there are no vacant seats)
     subtype:  #starer  a viewer who gazes fixedly (often with hostility)
     subtype:  #voyeur__Peeping_Tom__peeper  a viewer who enjoys seeing the sex acts or sex organs of others
  subtype:  #visualizer__visualiser  one whose prevailing mental imagery is visual
  subtype:  #witnesser__witness__informant  someone who sees an event and reports what happened
     subtype:  #attester__attestant  someone who affirms or vouches for the correctness or truth or genuineness of something
     subtype:  #testifier__deponent  a person who testifies or gives a deposition

No statement uses or specializes #perceiver; click here to add one.