Sort these animals into two groups according to their diet.

Cows, Gorillas, Hummingbirds, Fish
Herbivores: Cows, Gorillas

Omnivores: Hummingbirds, Fish (depending on the species)
Complete the following task based on the instruction and optional input provided.### Instruction:
Sort these animals into two groups according to their diet.

Cows, Gorillas, Hummingbirds, Fish

### Output:
Herbivores: Cows, Gorillas

Omnivores: Hummingbirds, Fish (depending on the species)