Pigeon Eye Sign: What the Five Circles Mean and Does It Work?

Eye sign is a fanciers’ theory that the rings of a pigeon’s eye, mainly the pupil, the circle of adaptation, the circle of correlation and the iris, show whether a bird will make a good racer or breeder. Many fanciers use it to choose stock, but no published study has shown that eye sign predicts racing results.

What is eye sign?

Eye sign grew up in the racing pigeon sport, alongside pedigree and handling, as a way to judge birds before they have raced. Followers study the eye in good daylight with a jeweller’s loupe and look at the pupil, the rings around it and the colour and texture of the iris (Farmer’s Weekly (opens in new tab)).

It remains one of the most divisive topics among fanciers. Some swear by it for pairing breeders. Others ignore it and judge birds only on results. For general advice on picking and managing a team, see our racing pigeon tips.

The five circles of the eye

Eye sign books describe up to five rings, counted from the centre outwards. The descriptions below are what the theory claims. They are fanciers’ terms, not anatomical ones.

1. The pupil

Eye sign followers prefer a small, round, jet-black pupil and link a large pupil to weak will or poor flying in bad weather. A pupil changes size with light and with how alert the bird is, so the same bird can look different from minute to minute.

2. The circle of adaptation

This is the thin ring right around the pupil. Followers like it broad, dark and clearly marked, and some books treat it as the most important ring for racers.

3. The circle of correlation

The circle of correlation sits between the circle of adaptation and the iris and is often called the breeding circle. Followers judge its width, colour and any fine radiating lines, which some books call distance lines and link to long-distance ability. Fanciers who use eye sign mostly use this ring when choosing birds to breed from.

4. The iris

The iris is the coloured part of the eye. Eye sign prefers rich, deep colour with a raised, grainy texture, which some writers compare to flowing lava, over pale or flat colour.

5. The outer circle

A thin dark edge sometimes shows at the outside of the iris. Fanciers call it the Vermeyen ring, after Louis Vermeyen, and some read it as a sign of breeding value. It is often easier to see in young birds.

Extreme close-up of a pigeon eye with a black pupil, a pale inner ring and a red-orange iris — Close-up of a pigeon eye. The pale ring around the pupil is what eye sign followers call the circle of correlation.

What decides a pigeon’s eye colour

Iris colour itself is well understood. A study of pigeon irises found three genetically controlled types. Yellow or orange irises (called gravel by fanciers) and white irises (pearl) both contain reflective pigment cells, and the yellow type also holds yellow pigments. The dark bull eye has no pigment cells in that layer, so it looks dark (Oliphant 1987 (opens in new tab)).

So eye colour is inherited, and it often runs with plumage colour. Dark bull eyes, for example, usually go with white feathering around the eye. That makes colour a poor guide to racing ability on its own. More on colour is in why pigeons have red eyes and pigeon colour genetics.

Does eye sign work?

There is no peer-reviewed study showing that eye sign predicts race results or breeding value. US racing pigeon expert Dr John Lamberton put it this way: “There is little definitive scientific evidence on this subject” and its value “is strictly a matter of personal faith and preference” (Farmer’s Weekly (opens in new tab)).

The closest test so far is a 2026 master’s thesis at the University of Novi Sad. A computer model was trained on 826 eye photos of racing pigeons sorted into “good” and “bad” birds from their race results and pedigrees, and it picked the right group about 75% of the time. The author notes that eye sign has not been scientifically validated, and the model did not show which features it used, so the study does not confirm the five-circle rules (Simonović 2026 (opens in new tab)).

If you enjoy eye sign, treat it as one opinion among several. Race results, health, temperament and the performance of related birds are better evidence.

What a pigeon’s eye can tell you

The eye is a useful health check. A healthy pigeon’s eye is bright, clear and dry, with a clean eyelid and no swelling. A closed or half-closed eye, discharge, redness, cloudiness or swelling are general signs of illness in birds and need a vet’s attention (VCA Animal Hospitals (opens in new tab)). A dull eye can also go with stress or tiredness after a hard race (see stressed pigeons and signs of a sick pigeon).

For how pigeons use their eyes, including their wide field of view, see pigeon eyesight and pigeon anatomy.

Head of a white pigeon with grey speckles and a dark brown eye

Pigeon eye sign FAQs

What is eye sign in pigeons?

A fanciers’ method of judging racing and breeding pigeons by the pupil, the rings around it and the iris.

What is the circle of correlation?

The ring between the circle of adaptation and the iris. Eye sign followers call it the breeding circle and judge its width, colour and lines.

What is the Vermeyen ring?

A thin dark ring at the outer edge of the iris, named by fanciers after Louis Vermeyen.

Does eye sign work?

No study has shown that it predicts race results. Many fanciers use it, but performance and pedigree are better evidence.

What eye colour is best in a racing pigeon?

None has been shown to be better. Gravel, pearl and bull eyes are inherited types and often follow plumage colour.

Sources

References used for this page:

Last updated 10 November 2026 · Racing