Cat tail movements and positions can be used to communicate a variety of messages. A cat's tail will often be held high when they are feeling confident and alert, while a low tail can indicate fear or anxiety. A tail that is twitching or flicking can indicate curiosity or excitement, while a tail that is tucked between the legs can indicate fear or submission. Additionally, cats may use their tail to communicate with other cats, such as when they are trying to establish dominance or when they are feeling friendly.