Chickens are not mammals. They are birds. They have feathers, not hair or fur, and they have wings, although they don’t fly very well. They do not have teeth that most mammals have, they exclusively lay eggs and do not feed chicks with milk. It is true that some birds do feed their chicks with crop milk, while chickens do not. Even birds that produce milk from crops are not considered mammals.
As birds, chickens are much younger than mammals, and the order to which they belong, the Galliformes, survived on an asteroid that fell to Earth and destroyed non-avian dinosaurs and arboreal birds 66 million years ago. The removal of dinosaurs allowed birds and mammals to evolve into the many forms that survive today. Indeed, during this extinction, birds were just beginning to form as a class of animals.

Why do people think chickens are mammals?
People may think of chickens as mammals because they are often found on farms with other livestock such as cows, sheep, pigs, and horses, all of which are mammals. People also eat chicken meat, which some consider to be healthier than cow or pig meat.
Chickens are also kept as pets such as dogs and cats. They like to live in hierarchical and more or less cooperative groups, tended by a male rooster. They are devoted parents, like most mammals. Interestingly, the chicks are premature, which means they are ready to take care of themselves soon after hatching. Early babies are unusual for mammals. However, chickens take great care of their chicks during the first few weeks of life, just like mammals. Chickens not only do not produce milk, but they also do not feed their young directly like other birds. Instead, she guides them to food and water, and they help themselves.

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FAQ (Frequently Asked Questions)
Are chickens endangered?
In general, chickens are the exact opposite of endangered species. As livestock, there are billions of chickens living in most places around the world, many of which are raised on industrial farms. However, there are some breeds that could be considered endangered. This is usually because farmers find them inferior when it comes to their meat or egg production, or because they need too much grooming to stay healthy. Increasingly rare chicken breeds include:
- White sultan
- Silver Phoenix
- Lakenvelder
- Faverole with salmon
- Buckeye
- Chantecler
- Holland
- Red Hat
- Crevecoeur
- White Yokohama
What is chicken?
This bird is a subspecies of the red jungle bird, Gallus gallus… Scientific name of chicken Gallus domesticus… The red male jungle bird looks like a small, very colorful domestic rooster, while the jungle hen looks more like a black grouse. They are native to Southeast and South Asia.
What are they needed for?
Chickens are raised for meat, which is high in protein and low in fat. They are also raised for egg production as chickens can lay many eggs without the help of a rooster. Chicken eggs are also delicious and rich in nutrients. Fertilized eggs are used to study embryology. Chicken feathers, including the sickle tails of roosters, were used to decorate hats and other clothing. Some people use roosters for cockfighting, crowing contests, or religious ceremonies. Chickens are mentioned in the myths and religions of many people.
How many chicken breeds are there?
There are at least 500 chicken breeds worldwide, although 53 large breeds are recognized by the American Poultry Association, as well as some bantam breeds or miniature breeds.
What is a brood hen?
A brood hen is a hen that sits on the nest and does not want to move. She won’t even move to eat, drink or bathe, and will be offended if someone tries to move her. She shows this by pecking or fluffing up feathers. Broods are great for incubating eggs, even different types of eggs such as guinea fowl or ducks.
When were chickens domesticated?
Scientists believe that chickens were first domesticated about 8,000 years ago, mainly for cockfighting. Then, people discovered that chickens and their eggs are good to eat.
What kind of chickens are there?
The chicken is the chicken and the biddy is the chicken that just came out of the egg. A cockerel is a male hen less than a year old and a pullet is a female less than a year old. A hen is an adult chick, and a rooster or rooster is an adult chick. The capon is a castrated male.
What are the parts of the chicken?
The chicken is an animal of exceptional appearance. No other animal looks like him, and most people can tell the difference between a chicken and any other species of bird. Here are some details from head to toe:
- Comb and wattle. The comb is the fleshy part at the top of the bird’s head. Rooster combs are larger and come in different shapes. They are pillows; Strawberry; familiar single; buttercup, which is a kind of double single; V-shaped; rose and peas. Chickens also have earrings under their beaks. Piglets, earlobes and scallops are collectively called caruncles.
- Hack. Going down, the strands are neck feathers and can be quite pretty and elegant on a cockerel.
- Cape. The cape is on the back of the neck.
- Saddle. The cape goes down to the back and then to the saddle, which are the feathers just in front of the tail. These soft feathers are often used to make fishing flies.
- Sickle. Both the hen and the rooster have tail feathers, but many rooster breeds also have sickles. These are those long, sickle-shaped fathers curving over the tail feathers.
- Pooh. These are soft feathers at the bottom that hide the chicken’s hole.
- Hock joint. This is the junction of the drumstick and drumstick of the chicken.
- Shank. This is the part of the leg that is below the hock but above the chicken leg.
- Spur. It is a keratin-coated bone that grows out of the lower leg and is used for defense. Spurs are very noticeable on the roosters.
- Claws and toes. Chickens have four toes and each toe has a claw. The claws are not very sharp and are used to scratch the ground.
Are chickens omnivorous, herbivorous or carnivorous?
Because chickens eat seeds, grass, corn, insects, worms, small reptiles, and even mice, they are considered omnivores.
Are chickens dangerous?
Chickens are too small to be a danger to adults, and humans have bred aggression out of most breeds. However, there are roosters that have a reputation for being aggressive. Some, like those used in cockfighting, are trained to be aggressive, and poultry farmers say that one rooster or even one chicken whipped a man. One rooster named Eccentric was known for its cruelty. He killed at least two cats, chopped off the tip of someone who tried to pet him, shattered the camera lens, pecked out a dog’s eye, injured his master to the point where it took eight stitches, and in an act of filicide flared up. his aviary and killed his own son. Oddball was born in 1970 and weighed 23 pounds at its heaviest age, several times more than a normal rooster.
Are chickens migrating?
Domestic chickens do not migrate. They have no instinct to migrate, and of course they are simply not allowed to do so. Its ancestor, the red jungle, does not migrate either. Like the domestic chicken, it flies poorly and can fly long enough to roost. Its habitat is also abundant in food all year round and provides the hen with sufficient hiding place to protect its eggs.
How long do chickens live?
Chickens live from five to 10 years, but the lifespan depends on the breed. The oldest chicken is believed to have lived to be 16 years old before dying of a heart attack.