Pigeons are often likened to flying garbage bins – a reputation gained by their habit of eating discarded human food in our towns and cities.
So if pigeons eat anything and everything, why would they eat clay?
Pigeons do eat clay. The main explanations suggested are:
- curiosity – pigeons will eat almost anything.
- clay contains salts, which may help break down nutrients and make them easier to absorb.
- clay absorbs toxins in a pigeons diet.
Clay is a Source of Salt
As a herbivore, a pigeon will not get the whole spectrum of nutrients it needs from a mainly plant-based diet.
Just like any living creature, pigeons need vitamins and minerals and seeds, nuts and grasses will not provide the whole range.
You might not imagine that clay provides any nutritional benefit, and it is too fine to be used as grit in the grinding process in the gastrointestinal tract.
However, all types of clay contain various salts in varying degrees with some richer in sodium, others richer in potassium, magnesium and silica.
By consuming the clay, pigeons ingest some of the key salts they need.
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There is no specific study on pigeons but a book on parrot nutrition by Machelle Pacion (opens in new tab) discusses macaws in the Amazon, which are well known for eating clay, and the relationship between sodium and the digestive process.
As there are many biological similarities in birds, it is possible that these findings also apply to pigeons.
Sodium plays a part in hydrolysis – the breaking down of nutrients to enable their absorption – by helping to draw out the digestive juices that carry it out.
It Helps to Absorb Toxins
Another hypothesis is that a pigeon will eat clay to facilitate toxin absorption.
The diet of birds means that they are always at risk of ingesting something harmful and eating clay enables pigeons to get the benefits of the food without being negatively affected by any toxins that might be present.
It may be a way of reducing harm from the food.
You can think of pigeons eating clay in a similar way to how taking activated charcoal (opens in new tab) pills has become a recent health trend for humans.
The idea is similar: binding potential toxins.
This idea should also be familiar to anybody who has ever been to a spa and undergone a toxin-absorbing clay body wrap treatment!
Some of the items that a pigeon might eat which will need to be neutralized by eating clay include the likes of acorns, apple seeds, almond nut pith and peach pits.
Any foodstuff that contains more than trace levels of compounds like quinine and tannic acid is also not good for pigeons.
Do Other Animals Eat Clay?
Clay may contribute to the overall good health and stable homeostasis (opens in new tab) of our pigeons but is this phenomenon of eating clay something that is just reserved for the pigeons and other birds of this world?
The answer is definitely no.
Though birds might be the most likely to eat clay from places like shallow river beds regularly, a number of other animal species have been discovered to ingest the same substances for the same reasons of toxin absorption and nutrient ingestion.
The types of animals that eat clay are very wide-ranging and includes:
- Elephants
- Monkeys
- Buffalo
- Deer
- Butterflies
- Bats
In parts of the world where the environment and food options carry a greater risk of toxicity, some of these animals rely on clay to provide the toxin absorption that can be the difference between life and death for them, especially when they are in the process of making long migratory trips away from familiar drinking holes and food sources.
Now you know that pigeons do indeed eat clay, and you know the main explanations researchers have suggested for it!
The more we know about the animal kingdom, the better we can become at living in harmony with the wonderful creatures on this planet.
And yes, we do happen to think that a humble pigeon is as wonderful as a giant elephant!
Last updated 24 October 2026 · Nutrition