It seems like you're trying to complete a phrase or a riddle. The phrase "it is a hear. its tail is the (short)" suggests that you might be talking about a creature or a wordplay involving a "hear" and "short."
If you're referring to a type of animal, the answer might be "rabbit," since "hear" could mean "hare," and "its tail is the (short)" could imply that a hare has a short tail.
If it’s a riddle, the answer you’re looking for might be "hare," as "its tail" refers to "short" as in the word "hare" compared to "long."
If this is not what you meant, could you please provide more context or clarify your question?