Aquatic predators, cachalot whales have four-chambered stomachs, use peristalsis for food digestion.
Deep-diving predators, four-chambered stomachs, some species with up to fourteen stomach compartments.
Slow-moving herbivores, four-chambered stomachs, specialized for digesting low-nutrient leaves.
Tallest living animals, herbivores with four-chambered stomachs, regurgitate and chew food for efficient digestion.
Ruminants with four-chambered stomachs, process quickly-digestible vegetation, require nutrient-rich diet for antler growth.
Herbivorous mammals, three-chambered stomachs, ferment food in first
Semiaquatic herbivores, consume vegetation, three-chambered stomachs, fermentation occurs before digestion.
Flightless birds, largest bird species, three-chambered stomachs, store stones in gizzard for grinding food, omnivorous diet.
Reptiles with double-chambered stomachs, use gizzard stones for grinding, feed on fish, crustaceans, mammals, and birds.