List of mammals that lay eggs

In nature there is a great variety of animals and species with unique behaviors and qualities.In order to establish a classification, it is possible to divide them according to their characteristics, whether reptiles, birds, fish or amphibians.However, as incredible as it may seem, there are cases where a species shares characteristics of both one class and another.p>

On this occasion, in ExpertAnimal, we will talk about the mammals that lay eggs, their characteristics and examples .Does it sound a bit strange? But they exist! Find out what they are !

Do mammals lay eggs?

In principle, most mammals , including humans, have a type of sexual reproduction , in which male and female cells are necessary from two different individuals for fertilization to occur and, therefore, a new life begins.However, there are some mammals that reproduce by means of eggs .These belong to the order monotreme .This order includes all those mammals that, at the same time, have reptile characteristics; among them, ovipara reproduction.This type of reproduction is carried out thanks to the existence in the body of individuals of a hole called cloaca, which fulfills functions of digestive, urinary and reproductive system.

On the other hand, monotremes or monotremados, as they are also known, not only possess reptilian characteristics, but also share qualities with their mammal companions, such as the following:

They are animals Homeotherms, that is, they can keep your body temperature within certain limits.
The surface of your skin is covered with hairs.
They feed their young through the milk produced in their organisms.
They have diaphragm.
Their heart is divided into four cavities .

Thanks to all this, in the body of these peculiar species characteristic animal orders appear It is completely different, making them quite rare specimens.Now, do you want to know which are the mammals that lay eggs? There are only two! Discover them below!

Mammals that lay eggs: platypus

The platypus, whose scientific name is Ornithorhynchus anatinus , has a curious appearance that suggests that it was formed with parts of different animals., you can guess that it has the beak of the ducks, the webbed feet of the otters, a tail equal to that of the beavers and, as if that were not enough, a rather thick and bushy fur! And that is not all ! Incredible as it may seem, the platypus is a poisonous animal , as it has a spur on its hind legs that it uses to defend itself against predators.Its fur is dark brown with gray or yellow spots; the strands being so thick, they protect it in the water, where it spends much of its life.Most of the specimens measure 60 centimeters and weigh about 3 kilograms .

As for its habitat, the Ornithorhynchus anatinus is native to eastern Australia and lives in burrows or river banks.It feeds on insects and other invertebrates that it traps through a method called electrolocation on.With this method the platypus is able to perceive the weakest electrical impulses that other animals produce when moving.

As for its reproduction , as we said, females lay eggs that first form in elutero and, then, are incubated for an approximate period of 10 days.In general, they do not usually put more than three, being two the most usual figure.Once hatched, the little ones feed on breast milk that, oddly enough, doesn't extra in through the mother's nipples, because they don't have nipples! In this way, the females have mammary glands but secrete the milk through pores that they have on the skin and through which the young can lick it.If you want to discover more curious facts, do not miss the article "Curiosities about the platypus ".

Mammals that lay eggs: echidna

Another of the mammals that lay eggs is the echidna or Tachyglossidae. This is a sturdy animal, surrounded by long spines of about 7 centimeters in length, which also has a short hair that covers it and has no tail.Its appearance, at first glance, is very similar to the hedgehog .

Like many other animals, the defensive system of the echidna are its thorns, which it uses by burying the rest of its body and offering its predators as if it were a coat of thorns.There are two species of echidna : the common echidna or short-nosed and long-nosed echidna.

Only inhabits the island of New Guinea and Australia. It is a nocturnal animal , so during the day it is usually hidden between rocks, holes, roots of trees and shrubs.He is a very good swimmer and feeds especially on insects, which he locates through his sense of smell; its view, on the other hand, is very limited.Another of the hunting mechanisms of this species is its sticky tongue.It measures 20 centimeters in length and uses it to capture its prey.The echidna has no teeth , so crush your food with a kind of corneal spines that are located on the palate at the end of the mouth.

Like the platypus, the echidna belongs to the group of monotremes, so that its reproduction is ovipara like birds, but it feeds its young through mammary glands like any other mammal.

Now that you know the two mammals that lay eggs, do not miss the following articles to expand your knowledge about the animal world:

If you want to read more articles similar to List of mammals that lay eggs-Features and curiosities , we recommend that in three in our Curiosities section of the animal world.

Comments

How to know what size a mongrel dog will be?

When we talk about a mixed breed dog or mixed breed dog , generally we refer to a dog whose ancestry is unknown and that has typical characteristics of two or more breeds.This is usually the result of a non-selective breeding, but generally fortunate, since a mongrel dog can be exactly as good companion as a dog of a certain breed. Due to numerous factors, although here it is worth highlighting the great genetic variability, there are many advantages of having a mongrel dog and it is important to emphasize this point since unfortunately it is usually grant a lower value to a dog of these characteristics.If you are thinking of adopting a mixed breed dog, you are surely gathering all the necessary information, if you are wondering how to know what size a mongrel dog will be I didn't leave It is to read this article of Animals and Pets Online. Is it possible to know the size of a mongrel dog? Of course, estimating the exact size of a mongrel dog is not an easy task, although ...

Reiki for dogs with anxiety

I think that everyone who once had contact with animals can recognize that they are smiling beings and very spiritual.They have emotional energy, a body and an instinct that can not be taken care of when they need it.Those who have an animal in charge of them, take care of their physical needs, such as food, hygiene and veterinary care, but sometimes it is necessary, attend it holistically. From Animals and Pets Online we will see how to help with reiki for dogs with anxiety .We not only have anxiety as a deviation in the health of our dog but, we can notice that we are going The path to disease and reiki will be a very useful tool when restoring harmony. What is anxiety? Anxiety goes beyond dogs, we humans also suffer from it, and it is a emotional state that acts against well-being .Animals have an emotional memory, so many who have gone through situations of abandonment or abuse have recorded wounds inside. These memories will not be easily overcome for some more sensitive...

Can dogs eat bread?

There is a widespread belief that "bread is bad for dogs "Will it be true? Being made with flour and water, plus the addition of yeast, the bread becomes a preparation high in carbohydrates, and although the bread is not among the prohibited foods for dogs, we must point out that Excessive carbohydrate intake can be detrimental to the health of our furry. Do you wonder if dogs can eat bread? Well, you went to the right page! In this article of Animals and Pets Online, we tell you the recommendations and care to take into account before offering bread to our furry, to provide them with a balanced diet that addresses their nutritional needs. Is it bad to give dogs bread? Dogs are omnivorous animals that can maintain a varied diet to benefit from the properties of different types of food.However, their nutritional requirements are based on the consumption of protein from high quality, good fats, vitamins and minerals.The other components (such as carbohydrates) may be...

The best cat breeds for allergy sufferers

Approximately about 30% of the population suffers cat allergy and dogs, the first option being much more common than the second one.However, being allergic to one or more animals does not mean that the body of the affected person reacts as a result of the presence of the feline, can, etc., but for the proteins found in the urine, dandruff or saliva of animals, called allergens. 80% of cat allergies are a the Fel D1 protein , produced in the saliva, skin and some organs of the animal.In this way, and despite the erroneous belief of many, it is not the hair of the feline that causes the allergy, although It can accumulate in the allergen after self-treatment.Also, if you are part of the aforementioned 30% but you love these furry companions and you would love to be able to Vir with one, you should know that there is a series of cat breeds for allergies that produce a smaller amount of the allergen, as well as a series of very effective techniques to avoid allergic reactions.Read ...

Ear infection in dogs

Do you notice that your dog frequently shakes its head and emits a strong body odor? These symptoms can be due to numerous disorders, however, they are typical of an ear infection, a disorder that usually has a good prognosis but must be treated in time to prevent damage to the tympanum or condition of the deepest parts of the ear./p> We should also know that this treatment can be performed naturally, using resources that are effective to restore the health of our pet and that are also safe and less aggressive than a pharmacological treatment. Are you interested in knowing more about this option? In this Animals and Pets Online article we talk about home remedies for ear infection in dogs. Ear infection in dogs First of all we must understand exactly what is ear infection in dogs, since initially it is possible that we believe that it is the same as otitis, however, they are two different terms. Otitis is an inflammation of the ear and can have numerous causes such as al...

Differences between a Persian cat and an angora

Although both breeds are known and popular, for some lovers of cats the differences between a Persian cat and an angora are not entirely clear, perhaps because they both have a spectacular long coat, but the differences between both races are remarkable and, if we want to adopt any of these cats, it is important that we have them in order for our new cat to adapt as well as possible to our home. This is why in this article of Animals and Pets Online we will expose the differences between a Persian cat and an angora .If you intend to adopt any of these cats, this article of Persian cat vs Angora is essential! Physical differences between Persian and Angora cats We begin this review of the differences between a Persian cat and an angora for the most obvious, that is, those that refer to physical aspects.These are going to be the following: The nose: it is, perhaps, the most important and significant, in addition, at first glance it will allow us to differentiate a Persian cat a...

Salmonellosis in rodents

Today rodents have become excellent companion animals and there are numerous people that in their house they have guinea pigs, hamsters, mice, gerbils, squirrels, chinchillas or irons. Rodents are active and sociable pets that although they require care they are easy to keep in good condition, however, they are susceptible of contracting multiple diseases and can even transmit some of them to humans, as is the case of salmonellosis. In this article of Animals and Pets Online we show you how to prevent salmonellosis in rodents. What is salmonellosis? Salmonellosis is a disease caused by the bacteria Salmonella Typhimurium , which is usually found in chickens and their eggs as well as in some reptiles such as turtles. This pathogen is also known as Salmonella Enterica , a term that refers to the intestine since it mainly affects this body area, hence It manifests mainly through diarrhea, vomiting and nausea, not only in humans, since these signs are also visible in infec...

Why does my dog have 5 fingers on the hind legs?

Have you ever noticed how many fingers Do you have a dog in the front and back legs? You may have never noticed exactly, but dogs have 5 fingers on the front legs and 4 on the hind legs. However, sometimes we can see dogs that have 5 fingers on the hind legs , some even 6 and are called "ram".Do not be alarmed if this is your case, we will share with you all the necessary information so that you know why this characteristic is due and that you should (or don't). Keep reading this Animals and Pets Online article and discover why my dog has 5 fingers on the hind legs . Why do some dogs have spurs? The spur or "toe" on the hind legs of dogs is mainly due to genetics of a series of breeds concrete , although it can manifest itself in practically any dog.This characteristic does not represent any health problem and is not a disorder or malformation. It is believed that this claw that we can observe in the paws Rear could serve to give more support...

Differences between kangaroo and wallaby

Wallaby and kangaroo are Australian marsupials: after a short period of pregnancy within the womb their offspring end their development in their mother's abdominal bag, held in mammary glands for about 9 months until they can venture out of the bag, then the little ones only return to the breast bag. Both Wallaby like the kangaroo belong to the macropodidae family: they have oversized feet that allow them to jump, their only way of moving, since they live in the same continent and belong to the same marsupial infraclase and the same family of macropodidos are very similar, but still there are important differences between them. In this article of Animals and Pets Online we will explain what are the differences between wallaby and kangaroo. The size Kangaroos are much larger than wallabytes : the red kangaroo is the largest marsupial species in the world, the largest are always male and can measure more than 250 cm from the tip of the tail to the head and weigh about 90 ki...

Types of wasps

The wasps are insects belonging to the family Vespidae and belonging to one of the largest orders of insects, where there are also ants, bumblebees and bees, among others.They are eusocial animals, although there are also some species that prefer solitude. One of the most distinctive characteristics of the wasps is the "waist", the area that divides the thorax of the abdomen.They can also be distinguished by having a stinger which they can use several times and not only once as in the case of bees. The wasps make their nest of mud or vegetable fibers; same that are in the ground, in trees, as well as in ceilings and walls of human rooms; All this depending on the type of wasp we are talking about.In this article of Animals and Pets Online you will know the different types of wasps , we invite you to continue reading. Subfamilies of Vespidos To better understand everything related to the types of wasps, we must detail that there are a total of 6 subfamilies of vespi...

Animals and Pets Online

Search This Blog