Narval a biography

Water its unique feature is a long spirally twisted horn, a little reminiscent of a corkscrew. Narvali are very large animals. Their weight can reach a ton and even more, and the body length - three meters. Adults are distinguished by a spotted color: brown-gray spots on a light background of the whole body. Interesting with its structure, the head of Narvalov. It has an elongated shape with a convex forehead and is movably connected to the body.

Thanks to this, Narvals, unlike most whales, can turn their heads. An external distinguishing feature is also the absence of a spinal fin. Instead, there is a spinal comb, the structure of which is unique to each animal, such as a leopard or a zebr strip. Only two upper teeth are developed in the dentist system of Narvalov. One of them is an amazing feature of this species - a two -meter twisted tusk weighing 10 kg.

It has all males, females are extremely rare - their teeth are not at all developed. There are even less than two tusks, but such cases are single. Currently, the question of why Narvalah needs such a tooth remains open. There are hypotheses that they need a tooth of male narvalovs to clarify relations in the marriage period. But nevertheless, the tusks are also found in females, which means this assumption is also incorrect.

At the initial stages of research, it was believed that a horn was needed as a tool of fishing. However, Narwall is mainly eaten with cephalopods of mollusks, less often fish perch, halibus, saika, cod and crustaceans. Therefore, the assumption that the whale pierces and pricks the prey is doubtful. After all, these animals are small, and hunting them with such large weapons is illogical.

Narvalus can rather dig a bottom with a bottom to scare food objects, but do not use it directly for fishing. According to recent studies, with a detailed examination of the structure of possible functions, the tusks found that the horn of Narvalov is extremely sensitive: it is penetrated by channels with nerves and blood vessels, while it is quite flexible and durable.

So, probably, he serves as an organ of senses. Despite the fact that by its origin it is the upper left cutter, its end can be bent. Photo author: Dottedyeti during the year Narvalus perform seasonal migrations. Every year, ice steps on the mainland and retreat back, and since the narvas live mainly along the ice floes, but prefer great depths, they migrate along with ice floes, overcoming more than kilometers per day.

In summer, animals occupy deep bays, in winter they are crowded between drifting ice. All this is due to different directions of cold movements, which are adhere to those sea inhabitants with which the narwals feed on. The closest relatives of the Narvalov are beluga. These two are now the only representatives of the Narvalov family. The marriage season in Narvalov begins in the spring, like in many other animals.

There is an assumption that females choose males along the length of the tusk. Pregnancy lasts quite a long time - 15 months, so females give birth only to the future summer, a year after mating. Usually one cub is born, there are very rarely two. Young individuals in color differ from spotted adults. The cubs are born with light gray or white, darken with age. Narvali are herd animals.

In groups, as a rule, there are near individuals. Communication occurs in two ways. A whistle is a loud high sound of different frequencies, as well as quiet low -frequency clicks that serve more for orientation in space. Sounds are reflected from objects around and returned back. This phenomenon is called echolocation. It is well studied with examples of bats and dolphins.

More narvalus occasionally release air bubbles of various sizes and with a certain frequency. It is likely that this is also some form of communication. Due to the large size of the body, adults of Narvalov do not have natural enemies, except for humans. Many Arctic predators can hunt for cubs. White bears are waiting for seals at the hole when they emerge to take a breath.

Sometimes from such a hole can emerge and hacked. The bear will not kill an adult whale, only it will cripple a little, but the cub can easily become a lunch for the predator. Therefore, during a flock of feeding near a hole, the main male is the first to emerge.

In the wedding period of walruses, males-males become very aggressive and attack almost all moving objects that they did not like. The object of an attack can often serve as a cut. Sharks can also hunt for the cubs of narvalov, who will enjoy eating a whale lagging behind a pack. They will not dare to attack a booped flock. Narvali are peaceful freedom -loving inhabitants of the cold waters of the Arctic.

In captivity, they are not adapted to live. It is not known a single case when Kit lived at least six months in imprisonment even under good conditions of content. Previously, they were often tried to support them in captivity, but to no avail. From ancient times, the indigenous peoples of the North were fed with narvas. The author of the text: Julia Kartmazova.