Predators and Prey: Grasshopper eats Terrestrial plants Harvest mouse eats Grasshopper and Terrestrial plants Hawk eats Harvest mouse, Rat, Shrew and Vole Heron eats Shrimp and Smelt Mallard eats Grasshopper, Terrestrial plants and Shrimp Owl eats Rat, Sparrow, Mallard and Sandpiper Rat eats Grasshopper, Terrestrial plants and Sparrow Sandpiper eats Shrimp Shrew eats Grasshopper Shrimp eats Aquatic plants Smelt eats Aquatic plants and Shrimp Sparrow eats Grasshopper and Terrestrial plants Vole eats Terrestrial plants and Grasshopper Apex Predators: Hawk, Heron and Owl Producers: Aquatic plants and Terrestrial plants Most Flexible Eaters: Hawk and Owl Tastiest: Grasshopper and Terrestrial plants Heights: Aquatic plants: 0 Grasshopper: 1 Harvest mouse: 2 Hawk: 4 Heron: 3 Mallard: 2 Owl: 4 Rat: 3 Sandpiper: 2 Shrew: 2 Shrimp: 1 Smelt: 2 Sparrow: 2 Terrestrial plants: 0 Vole: 2 For an A+: Herbivores: Grasshopper and Shrimp Omnivores: Harvest mouse, Mallard, Rat, Smelt, Sparrow and Vole Carnivores: Hawk, Heron, Owl, Sandpiper and Shrew