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Presentation - mammals - order insectivores. Biology presentation on the topic: "Insectivores Animal - Russian muskrat

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Insectivores are more archaic placentals that existed already in the Eocene. They have well developed jaws and muscles for chewing. The main food of insectivores, according to the name, are insects, centipedes and worms. The most common representatives of insectivores are the family of hedgehogs and others.

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Hedgehogs range in size from the smallest to the largest in the order. Body length from 10 to 44 cm (hymnura); tail length from 1 to 21 cm. The weight of the hymnura can reach 1.5 kg. The muzzle is elongated and pointed. The eyes and auricles are relatively well developed. Limbs plantigrade, 5-fingered; the exception is the four-toed African hedgehog, which has 4 fingers on its hind limbs. Hedgehogs are inhabitants of forests, steppes, deserts and cultivated landscapes. They settle under the roots of trees, in dense shrubs, under stones, dig holes. Mostly omnivorous, but prefer animal food: invertebrates, amphibians, reptiles (hedgehogs are famous for their endurance to snake venom), carrion. They are predominantly terrestrial animals, but many species are good climbers and swimmers. During the year 1-2 breeding seasons; outside of their hedgehogs lead a solitary lifestyle. Pregnancy lasts from 34 to 58 days; cubs in a litter from 1 to 7. Common hedgehog.

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Mole ordinary Moles are small and medium-sized insectivorous: body length from 5 to 21 cm; weight from 9 to 170 g. They (except for shrew moles living on the surface) are adapted to an underground, burrowing lifestyle. Their body is elongated, rounded, covered with thick, even, velvety fur. The mole coat has a unique property - its pile grows straight, and is not oriented in a certain direction. This allows the mole to easily move underground in any direction - the pile lies freely both forward and backward. The color of the mole is monophonic, black, black-brown or dark gray. The sense of smell and touch are well developed.

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Shrew shrew These are small animals that look like mice, but with a muzzle elongated in the form of a proboscis. Shrews include the smallest mammals: a tiny shrew and a baby polytooth - their body length is 3-4 cm, they weigh about 2 g. The largest shrew, a giant polytooth, weighs only 200 g with a body length of 18 cm. with an elongated face. The nose is extended into a movable proboscis. The eyes are very small. The limbs are short, 5-fingered. The fur is short, thick, velvety. The tail is very short to very long, exceeding the length of the body.

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Desman This is one of the largest insectivores of Northern Eurasia: body length 18-22 cm, tail - 17-21 cm, weight 380-520 g. Solid build. The neck is almost invisible from the outside. The head is conical, with a long movable nose-proboscis. The eyes are rudimentary, about the size of a pinhead, and have well-developed eyelids. There is no outer ear, the auditory openings (slits about 1 cm long) close when diving. The nasal openings are also closed with a special valve in the nasal cavity. Vibrissae very long; sensitive hairs grow on the body. The limbs are rather short, 5-toed, the hind feet are larger and wider than the front ones. The fingers to the claws are united by a swimming membrane. Nails well developed, long, slightly curved. Along the edges of all paws there is a border of stiff bristly hair, which increases the swimming surface of the paws.

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Haitian flint tooth These are relatively large insectivorous animals: body length 28-32 cm, tail 17.5-25.5 cm, weight up to 1 kg. Outwardly, they resemble rats or large shrews on high legs. The body is dense. The body is covered with reddish-brown or black fur. The tail is almost naked, scaly. The muzzle is narrow, elongated into a proboscis, hairless at the end; the nostrils open on the sides of the snout. The eyes are small. The ears are partially hairless. Fingers on all limbs 5; they are equipped with claws, which are longer and stronger on the front legs.

Birds in the garden are not only eaten berries on trees, as many believe. Most of the feathered guests in our gardens are insectivorous birds. Birds are the best cleaners of the garden, vegetable garden and fields from insects, bugs, caterpillars, which are trying to deprive us of the harvest. Let's get acquainted with birds from forests, fields and meadows, which help in the care of our gardens and orchards.

The main benefit of birds is that they eat a huge amount of insect pests. Of course, they cannot cope with all of them, but those insects that have survived are no longer so terrible for the garden. You may have seen birds such as starlings, flycatchers, swallows, wagtails, redstarts in your garden. These birds are already accustomed to people, and we are accustomed to them.

How do birds eat? Where do they collect their food? Every gardener should know that insectivorous birds at the place of "search" for food for themselves and for chicks are divided into 3 groups: 1 group of birds - finches, buntings, thrushes, rooks, jackdaws, redstarts collect their food mainly in the upper layers of the soil and on the surface soil, as well as in grass. 2 groups of birds - wrens, warblers and robins have chosen to gather food on the branches of bushes. The 3rd group of birds - goldfinches, tits, orioles, warblers - chose trees to search for food.

But we can also distinguish the 4th and 5th groups. The 4th includes the ubiquitous sparrows, because they collect food for themselves and for their chicks everywhere. Well, the 5th can be attributed to swallows that catch insects on the fly, which also bring great benefits to gardens. But when it rains, the swallows have to starve, because the insects do not want to fly at this time. By the way, this probably explains the sign that if swallows fly low, then it's raining. Insects probably feel that rain is approaching and, accordingly, fly low in order to have time to hide in time. Well, the swallows have no choice but to fly lower.

Sparrows Why did I start out of these destroyers of cherry orchards? Namely, to show that they are actually very useful and that you treat them with respect too. Imagine how sparrows have to work, feeding their 4-5 chicks at a time. And during the season they hatch chicks 2-3 times. Yes, and the chicks are not simple, but voracious. A sparrow has to fly up to the nest with food for babies about 300 times a day, and each time it is either an insect or a caterpillar. Why did I start out of these cherry orchard destroyers? Namely, to show that they are actually very useful and that you treat them with respect too. Imagine how sparrows have to work, feeding their 4-5 chicks at a time. And during the season they hatch chicks 2-3 times. Yes, and the chicks are not simple, but voracious. A sparrow has to fly up to the nest with food for babies about 300 times a day, and each time it is either an insect or a caterpillar. If you see sparrows picking at apple blossoms in the spring, don't chase them away. You can say they are doing you a great service, because sparrows pick out apple blossom beetles from there. If you see sparrows picking at apple blossoms in the spring, don't chase them away. You can say they are doing you a great service, because sparrows pick out apple blossom beetles from there. Yes, you could see flocks of sparrows in the gardens and fields in the second half of the summer. It seems that they will eat the whole crop. This is what the Chinese thought at the time. Their government decided that the sparrows were actually eating them. So what do they do about pests? Usually they try to destroy. So the authorities decided to get rid of the sparrows, which did a huge favor for the real pests of the fields. Harmful insects multiplied so much that the Chinese had no choice but to bring sparrows from neighboring countries. So do not repeat the mistakes of the Chinese, do not drive sparrows from your garden. Yes, you can scare them with a stuffed garden, but in no case do not destroy the helper sparrows. Yes, you could see flocks of sparrows in the gardens and fields in the second half of the summer. It seems that they will eat the whole crop. This is what the Chinese thought at the time. Their government decided that the sparrows were actually eating them. So what do they do about pests? Usually they try to destroy. So the authorities decided to get rid of the sparrows, which did a huge favor for the real pests of the fields. Harmful insects multiplied so much that the Chinese had no choice but to bring sparrows from neighboring countries. So do not repeat the mistakes of the Chinese, do not drive sparrows from your garden. Yes, you can scare them with a stuffed garden, but in no case do not destroy the helper sparrows.

Titmouse Titmouse are mainly insectivorous birds and only occasionally feed on some seeds. They love to look for food on the branches of garden trees, and they collect pests at various stages of their development. Tits collect eggs and larvae of pests, as well as adult muggers of garden trees. This bird copes well with codling moth caterpillars. During the summer, one pair of tits can clear almost 40 apple trees from pests. The tit hatches chicks 2 times per season and often there are about 7 chicks at a time, or even more. To feed the chicks, the tit has to fly to the nest with food 400 times during the day.

Starlings Starlings are migratory forest birds, but they liked living in birdhouses so much that they are happy to settle in our gardens. Starlings mainly look for their food on the surface of the earth and only sometimes on trees. Therefore, they can be attributed to the first group of birds. Starlings eat various larvae, and they catch them so quickly that the larvae rarely manage to hide. These birds lay eggs 2 times per season. Their chicks are also quite voracious, like those of tits and sparrows.

Rooks Rooks like to settle closer to people, although by nature they are forest birds. They eat mainly insects and their larvae, and most of them are pests. They catch both Khrushchev and wireworms. You will see a rook picking in the ground in a field or in a garden, do not drive it away. At this time, he can look for another pest. A pair of rooks brings a gram of various insects to their chicks every day. By the way, rooks can even eat a vole, because they are not at all small birds.

What else is the use of birds in the garden? I think everyone will agree that it is very pleasant to listen to the birds singing. But it turns out that not only we love their singing. Plants are also not indifferent to the beautiful songs of birds. There is no need to drive sparrows, swallows, rooks and other small birds from your gardens or gardens, think they are doing you good.

Insectivores are a group of primitive placental mammals of the chordate type. These are the most ancient animals, the development of the embryos of which occurs through the formation of the placenta. They appeared on Earth in the course of evolution at the beginning of the Cretaceous period. Paleontologists consider the insectivorous ancestors to be the progenitors of all placental mammals.

The insectivore order unites seven families: mole, hedgehog, flint-toothed, springbok, golden mole, tenrec, shrew. Orders, in turn, are divided into more than 60 genera, including more than 300 species. Representatives of insectivores - hedgehog, shrew, mole, muskrat.

Insectivores are widely distributed throughout the world, except for Antarctica, Greenland, Australia and most of South America. These animals inhabited different habitats: terrestrial (shrews, hedgehogs), aquatic (muskrat, otter shrews), soil (moles, golden moles). Insectivores are predominantly nocturnal. They are omnivores, but they prefer animal food, feeding on invertebrates (including insects - hence the name of the detachment) and small vertebrates. Many of the insectivores dig holes in which they hide from enemies. Some species hide in the forest floor. Insectivorous animals are active throughout the year, rare species from the hedgehog family are able to hibernate for the winter.

Insectivorous mammals are usually small to medium in size. The cover of the body of shrews, moles is short dense wool, tenrecs - bristles, hedgehogs - needles. The color of the coat is varied - from gray to black, sometimes spotted. The head of insectivores is elongated, often there is a mobile proboscis with long sensitive hairs. The eyes and ears of these animals are small and almost invisible. They have a very well developed sense of smell and touch. The teeth of all animals of this group are poorly differentiated. The limbs of most species of insectivores are plantigrade, each with five toes with claws. The tail can be almost invisible, like a hedgehog, or equal in length to the size of the body, like a desman. In the skin of animals there are special skin glands, in some species they secrete a secret with a strong odor.

There are characteristic features in the structure of the brain. The large hemispheres have a primitive structure without convolutions. They are small in size and do not cover the cerebellum, and the olfactory part of the brain is well developed.

Insectivores are polygamous animals. They breed 2-3 times a year, there can be from one to twenty cubs in a litter.

The importance of insectivores lies in the fact that they are members of a variety of natural biocenoses. For humans, some species of insectivores serve as objects of fur trade (moles, muskrats). Insectivores eat arthropods - pests of agriculture and forestry. But they themselves can be dangerous to humans, as some of them are intermediate hosts of ticks that carry serious diseases. Rare species of insectivores, such as muskrat, flint teeth, are listed in the Red Book and are under protection.

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Presentation on biology on the topic: “INSECTIVORUS” Completed by: students of class 7 “B” of class TsO No. 1748 Vostrikov Dmitry, Akopyan Albert

Insectivora (Insectivora) Detachment - primitive mammals. The limbs are five-fingered, equipped with claws. The muzzle is elongated and pointed, with an elongated nose protruding far beyond the skull. Teeth - incisors are often long, forming, as it were, pincers; fangs are always present, molars are covered with sharp tubercles. The eyes and ears are small and inconspicuous. The brain is primitive; the large hemispheres are smooth, without furrows; conditioned reflexes are developed poorly and very slowly.

Insectivores Desmanidae family Erinaceidae family Soricidae family Mole family Talpidae Solenodontidae family

The main food is insects and their larvae, worms and other small invertebrates. For hedgehogs - various fruits, for the otter shrew - small fish and crustaceans. Insectivores Insectivores are not very prolific. Insectivores are widely distributed throughout the globe, but are absent from Australia and most of South America.

Two species: Russian muskrat (one of the largest insectivores) - body length 18-22 cm, tail length 17-21 cm, weight 380-520 g. Teeth - 44. Almost blind, but has a developed sense of smell and touch. Pyrenean muskrat (small semi-aquatic mammal) - body length 11-16 cm, tail length 12-16 cm, weight 35-80 g. Desmanidae family

Hedgehog family (Erinaceidae) 2 subfamilies: real hedgehogs rat hedgehogs (hymnury). Body length from 10 to 44 cm; tail length from 1 to 21 cm. The weight of the hymnura can reach 1.5 kg. Teeth 36-44. Large hedgehogs live in nature for 4-7 years (in captivity - up to 16 years); small species - 2-4 years in nature and 4-7 years in captivity.

Family shrews (Soricidae) The smallest: tiny shrew and baby manytooth. Body length 3-4 cm, weight about 2 g. The largest: giant polydent, weight 200 g with a body length of 18 cm. Teeth - 26-32. The short-tailed shrew living in the USA and Canada and the water shrew (or waterfowl) living along the banks of water bodies in Russia are poisonous mammals.

Shrews are one of the most ferocious and aggressive predators.

Mole family (Talpidae) Body length 5-21 cm; weight 9-170 g. Teeth from 33 to 44 pieces. Moles (except for shrew moles living on the surface) are adapted to an underground, burrowing lifestyle. Widely distributed in Eurasia and North America. 15 genera, about 40 species

The family of cleft-toothed (Solenodontidae) The cleft-toothed family of venomous mammals includes one genus with two modern species: the Cuban cleft-tooth and the Haitian cleft-tooth. Now they live only in Cuba and Haiti. They are on the verge of extinction and are listed in the International Red Book!!! body length 28-32 cm, tail length 17.5-25.5 cm; weight up to 1 kg.

Fossil insectivorous Dienogalerix (Deinogalerix koenigswaldi) Lepticidium (Lepticidium nasutum) hairy hedgehog Italy Germany

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Description:

This presentation is devoted to the study of the order of insectivores. The presentation presents the characteristics of insectivores, their distinctive features, as well as habitats.

The presentation presents a description of the order of insectivores, it is said that they are relatively small in size, they have an elongated muzzle (often with a proboscis), a well-developed sense of smell, short legs, and small undifferentiated teeth. These animals feed on insects, which is evident from the name of the detachment. Some representatives of this detachment are listed in the Red Book.

In more detail, the presentation discusses the following representatives of the order of insectivores: eared hedgehog, common hedgehog, Russian muskrat, shrew, Japanese mole. The description of each animal is accompanied by illustrations, it is possible to view video files, if there is an electronic version of the Encyclopedia of Cyril and Methodius. The following is a discussion of the importance of insectivores in nature, and for humans.