Could the animals seen sometimes be reptiles that resemble kangaroos? I mention this because in 1900 a kangaroo-like creature, 50' in length, was allegedly shot in the Everglades. It was referred to as the Everglades Dinosaur. If it really existed, who knows what it was?
In 2005 an all too real kangaroo was captured in Iowa. Was this one of the Phantom Kangaroo population? It was placed in the Villa Real Zoo. It seemed to have no peculiarities distinguishing it from ordinary kangaroos.