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 do dogs see? - All about the sense of sight of the dog

The canine vision is a question that generates a lot of curiosity and expectation among dog tutors.Formerly it was believed that dogs saw only black and white, however, recent studies [1] point out that dogs have color vision , although it should be noted that it is more limited than what we humans possess. Apart from banishing false myths, in this article we will solve many doubts related to the sense of sight of the dog , explaining how dogs see at night, how dogs see colors or what factors influence the sense of sight of the dog, from puppy to adult stage.To answer all these questions, In Animals and Pets Online we have created this post, based on scientific studies, which addresses this issue in detail, par to help you better understand how dogs see , the colors, their abilities and other curiosities, such as the evolution of their vision.Continue reading! When do dogs begin to see? Have you ever wondered how puppies see ? The dog is a altricial species [2], a zoolog...

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...

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...

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...

Caring for a hamster's teeth

If you are a rodent lover you will know that these types of animals have numerous peculiar characteristics , such as its teeth, which are in continuous growth throughout the life of the animal. In the case of the hamster, a small rodent that has earned our love As a pet, we are facing one of the few animals that are already born with dental pieces, therefore, taking care of your dental hygiene and health is going to be a priority to be able to keep our little pet in optimal conditions. care that this animal requires is simple but we must also know with property how to care for the teeth of a hamster , in order to avoid any complications that could harm the health of our pet. The hamster's feed Prevention is better than cure and one of the main care of a hamster's teeth is to offer a balanced and adequate diet for our pet, since in this way we We assure you to provide all the necessary nutrients, without which, the hamster could develop an oral pathology. The hams...

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...

Do bitches have the rule?

Generally, bitches experience bleeding twice a year , known colloquially as menstruation or rule.In this article of Animals and Pets Online we will give some clues about bleeding and examine the correction of this terminology to refer to the reproductive cycle of female dogs. Understanding how this cycle works we can avoid unwanted pregnancies and discover what the importance of sterilization is. Do bitches have the rule? Find out below! Female dog's reproductive cycle To know if female dogs have the rule we must know how their cycle works and that this is repeated, in general, twice a year since they begin maturity, towards 6-8 months of life , depending on the races.This is divided into four phases which are the following: Proestro : in this phase of about 9 days the bitch begins to stain and produce pheromones that will attract males, although they will not yet accept them.The vulva begins to swell and, in addition, the dog may have changes in its behavior.It ...

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...

How do horses sleep? - Find out!

Like most herbivorous mammals, horses are not characterized by spend long periods of time sleeping, but the base of the dream and its characteristics are the same as the rest.A good rest is essential for the proper development and maintenance of the body.A being deprived of the necessary hours of sick rest and, most likely, will die. In this article of Animals and Pets Online, we will discover how horses sleep, if they stand on their feet or if the horses go to bed.Find out below! The physiology of sleep In the past, sleeping was considered a "state of consciousness", defined as a period of immobility in which individuals did not respond to stimuli, so it was not treated as a behavior, or part of the ethology of a species.We must not confuse rest with sleep, because an animal may be resting without being asleep. In the studies of sleep in horses the same methodology is used than with humans.Three parameters are measured, electroencephalogram to measure brain activi...

How to teach a cat to paw?

The tricks you can teach your cat depend on the ability to learn the animal has and your patience and perseverance to teach him what you want him to do, so do not believe that only dogs are able to follow orders because cats also have that ability, besides being very intelligent and enjoying interacting with their human companions. However, it is true that teaching a cat tricks is more difficult than a dog but with these indications that we give you next and using the positive reinforcement, the task will be much easier for you.The tricks that are most taught to cats are kicking, sitting, or turning on itself , but also They are able to learn other things like learning to use the WC or learning their name. First of all, you have to know that the ideal time to teach an order to a cat is when is active and never when asleep , sleepy or tired, because if you have to wake him up or encourage him to play with you you will never get good results.It is also recommended that the trai...

Animals and Pets Online

Search This Blog