10 cold-blooded animal killers

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10 cold-blooded animal killers
10 cold-blooded animal killers
Anonim

To date, it has been established that more than 1,300 animal species practice cannibalism in one way or another. These include both fish or insects and mammals such as dogs or monkeys.

black Widow

To date, it has been established that more than 1,300 animal species practice cannibalism in one way or another. These include both fish and insects and mammals such as dogs and monkeys.

Zoologists note that most often intraspecific predation is observed under unfavorable environmental conditions, overcrowding of the population and a lack of food and water. However, if we set aside "motives" and look at the dry statistics, we can find that females are more prone to cannibalism than males. The most famous female eating males is the representative of the order of praying mantises. We will start our top with it.

Mantis

For female praying mantis, size matters. Some members of this order are known for decapitating and eating their partner during mating. However, studies show that only one in six males are destined for such a fate. Moreover, under the blow of hungry predatory females, as a rule, small individuals fall.

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Burrowing frog

Many cannibal animals become "criminals" by pure chance, but this is not the case for Pyxicephalus adspersus, a frog that deliberately feeds on members of its species.

Adult burrowing frogs often arrange a feast of young individuals, however, frogs and even tadpoles themselves are not without sin - they can also eat their own kind. When the population of your own species is not threatened, why not become a cannibal? Under these conditions, other frogs are the most convenient food source.

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Polar bear

Despite their color, these bears also have a dark side. They are equally dangerous both for other animals and for members of their own species. In the event of a shortage of food, adult polar bears are able to eat bear cubs.

The researchers note that in recent years, cases of such cannibalism have increased markedly. This may be due to global warming, as a result of which the ice area has noticeably decreased. Meanwhile, bears get their food from under it, or they hunt seals lying on the frozen surface.

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Black tailed prairie dog

Some of the cutest cannibals in the animal kingdom are the black-tailed prairie dogs. However, their appearances are deceiving. If these animals had a court, then he would often consider cases of atrocities such as murder, kidnapping and pedophilia.

Lactating females of Cynomys ludovicianus sometimes supplement their vegetarian diet with cubs from neighboring burrows. This practice is so widespread among "black-tailed" dogs that only half of newborn prairie dogs manage to survive in such conditions.

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Rattlesnake

Who would have thought, but these terrifying inhabitants of the Mexican thickets practice the most "humane" cannibalism. Females of Crotalus polystictus after "giving birth" need rest and food, so most rattlesnakes (about 70%) eat their stillborn offspring.

The cannibalism of rattlesnakes allows them to regain their strength without resorting to hunting, which is not only dangerous, but also energy-consuming and time-consuming.

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Black Widow

Sexual cannibalism is something that could potentially make spider Latrodectus mactans friends with female praying mantises.

Black widows are famous for eating their mate during or immediately after the mating process. This phenomenon is due to the fact that the female spider spends a huge amount of energy for mating.In order to satisfy hunger, the "widow" devours her "groom", who is often smaller than the female.

Spiders of this species are also cannibals: being in a cocoon, they eat each other. As a result, only a couple of spiders are chosen at will.

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Crocodiles

The thought that these terrifying animals are also cannibals makes it somehow uncomfortable. However, it is a fact that some adult crocodiles often eat their younger "companions".

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Dzungarian hamster

Someone you probably didn't expect from this is the hamsters. Especially from the beloved by many "dzhungariks".

The females of these rodents are unlikely to ever win the Mother of the Year nomination. However, not everything is so simple here. Often, hamsters eat part of their offspring in order to be able to feed the survivors. The female eats stillborn, non-viable, defective cubs, as well as the weakest with a large litter, if she feels that she is not able to feed everyone.

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Sand shark

From sexual cannibalism to embryonic. This form of cannibalism is inherent in many species of sharks, but among the members of the sand shark family, it is especially cruel.

The fact is that the cubs that have not yet emerged from the mother's womb eat their fellows. Embryos that are lucky enough to hatch first are feasted on by those who have not yet been born. Moreover, unfertilized eggs are also used, which are rich in nutrients.

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Common octopus

Sex can be a matter of life and death for octopuses. For males of these cephalopods, each sexual intercourse can be the last. Most unlucky for those who contacted a female much larger than themselves and got up from the wrong tentacle.

Female octopuses, as well as female mantises and black widows, practice sexual cannibalism. The rules of the game are the same, just in this particular case, the male risks being strangled first, and only then eaten.

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