A tail. Humans can walk upright without it because of the way our spines are curved.
Thumbs and the ability to walk upright
The only non-human primates without a tail are the great apes and regular apes such as gibbons . Of them the only one that walks upright all of the time is a Human. So the answer to your question is a Human. The other great apes can walk upright, but they do so only for short periods of time when needed.
the first subhuman to walk upright was Homoerectus (Upright Man).
most primates CAN walk on two feet, but choose not to.
Australopithecus could walk upright on two legs.
Some primates don't - remember humans are primates too! But for those that do, it's because the structure of their spine makes it difficult to stand upright. The reason they have spines curved like they do is because they're evolutionarily adapted to spending their time on tree-tops. Standing upright isn't useful when you're sitting in a tree.
One trait is that they walk upright. No oter mammel does this all the time.
Some animals that can walk on two legs include apes, chimpanzees, and gorillas, but they use their hands for a lot of walking also. Humans can. Humans are classed as animals. Birds walk on two feet when they're not flying. Kangaroos, wallabies and kangaroo rats hop on feet. Tyrannosaurus Rex used to walk on two legs
Homo sapiens are modern Humans. most of us walk upright, but some don't.
Australopithecus was an important genus in human evolutionary history as they were among the earliest hominins to walk upright on two legs, a key characteristic that distinguishes humans from other primates. They also showed advancements in tool use and evidence of social behavior, paving the way for the development of more complex societies in later hominin species.
The people who claim to have had close encounters with Bigfoot say that there is no way this creature could be a bear. Bears can walk on the hind legs, but they are not bipedel. Bigfoot is bipedel (walks upright). Bears don't throw rocks; Bigfoot does. Throwing stones is a characteristic of primates.
yea they can but they rarely do