How the tail is carried
Position is the half you can read from a single photograph. Broadly, a tail carried high is a confident cat and a tail carried low or tucked is an uneasy one.
Tail held high
Confident & friendly
A tail carried straight up usually signals a happy, confident cat that is pleased to see you.
Question-mark curl
Playful & curious
An upright tail with a hooked or curled tip is an invitation to play and a sign of a friendly mood.
Quivering tail
Excited to see you
A tail held up and vibrating often means real excitement — a greeting reserved for favourite people.
Wrapped or curled
Content & self-soothing
A tail wrapped around the body (or around you) reads as calm, content, and a little bit of “I’ve got this”.
Relaxed & level
Calm
A tail held roughly level and gently moving is a relaxed, at-ease cat going about its day.
Tail held low
Wary or unsure
A low-carried tail can mean the cat is uneasy or cautious — though some breeds simply hold their tails low.
Tucked away
Anxious or scared
A tail tucked under the body or between the legs is a classic sign of fear, anxiety, or submission.
Puffed up
Startled or threatened
A bottle-brush, piloerect tail means the cat feels scared or threatened and is trying to look bigger.
How the tail is moving
Movement is the other half, and a still photo cannot show it. These three are why Tail talk accepts a short video — a thrashing tail and a resting one can look identical in a single frame.
Slow swish
Unsettled or mildly irritated
A slow, continuous side-to-side sweep of the whole tail. Often seen when a cat is unsure about what is happening around it, or mildly irritated.
Twitching tip
Alert and focused
Quick, abrupt flicks — often just the last few inches of the tail. Usually a cat locked onto something interesting.
Thrashing tail
Agitated — give space
A fast whipping or thumping tail means agitation or overstimulation. This is a “please stop” from your cat.
The hardest call
Telling a swish from a twitch from a thrash is the distinction we get wrong most often, and it comes down to two things: how far the tail travels and how much of it moves. A swish is slow and wide and moves the whole tail. A twitch is fast and small and is often only the tip. A thrash is fast and wide and forceful — and it is the one worth acting on, because it means give the cat some space.
How PurrSight reads it
Upload a photo and we read the tail’s position. Upload a short video and we sample a handful of frames in order, so movement can be judged from the change between them. The model picks one state from the list above, reports the concrete cues it actually saw, and states its own confidence — which is deliberately shown as low, medium or high rather than a percentage, because a number would imply a precision this does not have.
If the tail is not visible, if there is more than one cat, or if the footage is too unclear to judge, it says so instead of guessing.
This is not a clinical tool
Worth being blunt about, because this page looks a lot like our Feline Grimace Scale page and carries nowhere near the same weight.
The Feline Grimace Scale is a validated instrument — developed, tested and published by veterinary researchers, with a measured threshold for when a cat needs pain relief. Tail reading is general body-language knowledge. It is widely accepted among people who work with cats, and it is genuinely useful for understanding your own cat, but there is no validation study behind our version of it and no threshold that means anything clinically.
So: enjoy it, use it to get to know your cat a little better, and do not use it to decide whether your cat is unwell. A tail that worries you, or a cat behaving unlike itself, is a reason to call a vet — not a reason to upload another video.