Agroup of animals among which a relatively long cecum

 A group of animals among which a relatively long cecum are herbivores.

Cecum is a junction inside an organism's body which connected small and large intestines
The digestion systems of herbivore could take up to 25 times of the size of their body, which mean that organisms with long cecum is most likely to be a herbivore

Wetlands form where water and land meet. a lake with a wetland fringe can fill in with decayed plant and animal material to become a wet meadow. a pond can fill in to become a bog or fen. sediment can fill in a river marsh to become a swamp.flooding of coastal lowlands from rising sea levels has created broad coastal marshes that are protected from wave action by barrier islands or reefs. coastal wetlands also form when rivers deposit sediment as they reach the ocean. plants then take root and hold the soil firm against the forces of tides and waves.