old_contents: CHOICES_HABITAT = (
      ("Forest", "Forest"),
      ("Heavy Cover", "Heavy Cover"),
      ("Light Cover", "Light Cover"),
      ("Grassland", "Grassland"),
  )
  
  CHOICES_BROWSEGRAZE = (
      ("Grazer", "Grazer"),
      ("Browser", "Browser"),
      ("Mixed Feeder", "Mixed Feeder"),
  )
  
  CHOICES_SIZE_LINTULAAKSO = (
      ("A", "A: 0.5 - 8 kg"),
      ("B", "B: 8 - 45 kg"),
      ("C", "C: 45 - 90 kg"),
      ("D", "D: 90 - 180 kg"),
      ("E", "E: 180 - 360 kg"),
      ("F", "F: 360 + kg"),
  )
  
  CHOICES_SIZE_BRAIN_BUNN = (
      ('1','I: < 23 kg',),
      ('2','II: 23 - 113 kg',),
      ('3','III: 113 - 340 kg',),
      ('4','IV: 340 - 907 kg',),
      ('5','V: 907 - 2721 kg'),
      ('6','VI: >2721 kg'),
  )
  
  CHOICES_LOCOMOTOR_REED = (
    ('A', 'arboreal'),
    ('AT','arboreal-terrestrial'),
    ('S','subterranean'),
    ('ST','subterranean-terrestrial'),
    ('T','terrestrial'),
    ('TA','terrestrial-aquatic'),
    )
  
  CHOICES_TROPHIC_REED = (
      ("B","leaves"),
      ("C","meat"),
      ("C/B","meat/bone"),
      ("C/I","meat/invertebrates"),
      ("FG","fresh grass"),
      ("FL","fruit plus"),
      ("G","grass"),
      ("I","insects"),
      ("MF","leaves and grass"),
      ("OM","omnivorous"),
      ("R","roots/bulbs"),
  )
  
  CHOICES_TROPHIC_LINTULAAKSO = (
      ('C','Carnivore'),
      ('P','Piscivore'),
      ('M','Myrmecophage'),
      ('MF','Mixed-Feeder'),
      ('FG','Frugivore-Granivore'),
      ('FH','Frugivore-Herbivore'),
      ('FO','Frugivore-Omnivore'),
      ('IO','Insectivore-Omnivore'),
      ('I','Insectivore'),
      ('G','Grazer'),
      ('B','Browser'),
  )
new_contents: CHOICES_HABITAT = (
      ("Forest", "Forest"),
      ("Heavy Cover", "Heavy Cover"),
      ("Light Cover", "Light Cover"),
      ("Grassland", "Grassland"),
  )
  
  CHOICES_BROWSEGRAZE = (
      ("Grazer", "Grazer"),
      ("Browser", "Browser"),
      ("Mixed Feeder", "Mixed Feeder"),
  )
  
  CHOICES_SIZE_LINTULAAKSO = (
      ("A", "A: 0.5 - 8 kg"),
      ("B", "B: 8 - 45 kg"),
      ("C", "C: 45 - 90 kg"),
      ("D", "D: 90 - 180 kg"),
      ("E", "E: 180 - 360 kg"),
      ("F", "F: 360 + kg"),
  )
  
  CHOICES_SIZE_BRAIN_BUNN = (
      ('1','I: < 23 kg',),
      ('2','II: 23 - 113 kg',),
      ('3','III: 113 - 340 kg',),
      ('4','IV: 340 - 907 kg',),
      ('5','V: 907 - 2721 kg'),
      ('6','VI: >2721 kg'),
  )
  
  CHOICES_LOCOMOTOR_REED = (
    ('A', 'arboreal'),
    ('AT','arboreal-terrestrial'),
    ('AQ','aquatic'),
    ('S','subterranean'),
    ('ST','subterranean-terrestrial'),
    ('T','terrestrial'),
    ('TA','terrestrial-aquatic'),
    )
  
  CHOICES_TROPHIC_REED = (
      ("B","leaves"),
      ("C","meat"),
      ("C/B","meat/bone"),
      ("C/I","meat/invertebrates"),
      ("FG","fresh grass"),
      ("FL","fruit plus"),
      ("G","grass"),
      ("I","insects"),
      ("MF","leaves and grass"),
      ("OM","omnivorous"),
      ("R","roots/bulbs"),
  )
  
  CHOICES_TROPHIC_LINTULAAKSO = (
      ('C','Carnivore'),
      ('P','Piscivore'),
      ('M','Myrmecophage'),
      ('MF','Mixed-Feeder'),
      ('FG','Frugivore-Granivore'),
      ('FH','Frugivore-Herbivore'),
      ('FO','Frugivore-Omnivore'),
      ('IO','Insectivore-Omnivore'),
      ('I','Insectivore'),
      ('G','Grazer'),
      ('B','Browser'),
  )
subject: add aquatic