Here are some ways you could describe it:
* Bipedal: This is a scientific term that means "walking on two legs."
* Two-legged: This is the most straightforward description.
* Biped: This is a shorter, more informal version of "bipedal."
* Two-footed: This is another straightforward description.
* Two-legged creature: This is a more general description that can apply to any animal with two legs.
It's important to consider the context when choosing the best term. For example, you might use "bipedal" in a scientific paper, but "two-legged creature" in a children's book.
It's also important to note that some animals, like birds, have two legs but use their wings for locomotion, so they might not be considered "bipedal" in the strict sense of the word.