Swamp denizens are animals that inhabit wetlands and marshes. Two of the most common swamp denizens are the gator, which is a five-letter word, and the TOAD, which is a four-letter word. Gators are large reptiles that are native to the United States and can be found in swamps, rivers, and lakes. Toads are amphibians that are found in many parts of the world, including swamps. Both gators and toads are important members of the swamp ecosystem.