Predators and Prey:
  Grasshopper eats Grass
  Hawk eats Grasshopper, Lizard, Mouse, Rabbit and Snake
  Lizard eats Grasshopper
  Mouse eats Grass
  Rabbit eats Grass
  Snake eats Mouse

Apex Predators: Hawk
Producers: Grass
Most Flexible Eaters: Hawk
Tastiest: Grass

Heights:
  Grass: 0
  Grasshopper: 1
  Hawk: 3
  Lizard: 2
  Mouse: 1
  Rabbit: 1
  Snake: 2

For an A+:
  Herbivores: Grasshopper, Mouse and Rabbit
  Omnivores: (None)
  Carnivores: Hawk, Lizard and Snake