All bugs are insects but, all insects are not bugs. Students will look at pictures of insects from different parts of the world, and they will learn four of the main characteristics of all insects. Sometimes a magnifying glass or a microscope is needed. The insect body can be divided into three main regions the head that contains the antennae, eyes, and mouthparts, the thorax that has the legs and wings, and. In this article we will discuss about the growth and metamorphosis in insects. Pdf insects are small creatures that are unavoidable by humans and other animals. Dec 12, 2017 all bugs are insects but, all insects are not bugs. That means they have a hard exoskeleton, or shell, on the outside of their bodies that protects them. The role of blood in insects is the transport of nutrients, wastes, and hormones. Without the activities of insects, human life on earth would. Insects represent one class of animals within the phylum arthropoda. Terminology, classification and use of scientific names.
In this lesson, were going to be exploring the diverse class of insecta, or insects. Adult insects have three pairs of legs, and most have two pairs of wings. The parasites may be microbes such as bacteria, virus and mycoplasma, or animals such as liver fluke, worms, nematodes, some insects and plants such as loranthus, cuscuta etc. I prefer to go in the opposite order, because the more advanced orders are more commonly. Insect classification hierarchal system of classification. They have maintained a position of ecological preeminence for over 400 million years. They range in size from microscopic soildwelling insects to large beetles and butterflies. But insect wings are in motion, with flapping and vibrations, resulting in churning and eddies, and the misconception that physics says bumblebees cant fly persisted. But none have all the same traits that insects share. Insects photographic atlas of entomology and guide to insect identification how to know the immature insects insects and diseases of woody plants of the central rockies pests of the west book title list handout. They include, for example, ants, bees, wasps, beetles, butterflies, dragonflies and fleas. In order to examine the wetting characteristics on a rough surface, a biomimetic surface with microscale pillars is fabricated on a silicon. True bugs belong to the order hemiptera under the class insecta. Modern humans200,000 years insects350 million years 100,000 different species live in north america.
Entomology 101 the insects washington state university. Although it is not the largest order of insects, diptera is definitely the most infamous thanks in part to the mosquito and fly species that it contains. The class hexapoda is generally studied under a classification system with approximately 30. Insects that go through an incomplete metamorphosis look very similar to adults of the same species, only smaller. Insects which produce honey, wax, lac, dyes and silk are commercially beneficial. Introduction to the identification of insects and related. This family also includes gnats, deer flies, horse flies, botflies and blow flies. The insects with complex social structures of this order are fascinating to observe and learn from. Choate much of our usual appreciation of an animal in any condition depends on our ability to identify and name it. Go to the tab that best exemplifies the damage observed on. Many organisms are similar and even related, such as spiders, scorpions, and millipedes.
Here are 10 traits that make insects thrive when other animals cant. General characteristics of parasites easybiologyclass. Insects have what we call an exoskeleton or a hard, shelllike covering on the outside of its body. It is not the primary means of moving oxygen and carbon dioxide. Their numbers are nothing short of remarkable both in terms of how many individual insects there are, as well as how many species of insects there are. We then move back to our seats for independent practice. Insects class insecta have segmented bodies, jointed legs, and external skeletons. There is no hemoglobin in insects except in immature chironomus spp. Over 150,000 living species of hymenoptera have been described, in addition to over 2,000 extinct ones.
Insect, any member of the class insecta hexapoda, the largest class of phylum arthropoda, about 1 million species or threefourths of all animals. Scott department of biological sciences university of alberta supported in part by academic technologies for learning and faculty of science, university of alberta these modules are designed primarily for use in introductory entomology courses at the university of alberta. Insects have a hard protective covering called an exoskeleton. Download it once and read it on your kindle device, pc, phones or tablets. If you use live animals for this lesson, you may want to keep. Most insects have 4 wings, but flies only have two, and their wings can beat up to about 200 times per second. Because they lack backbones, they are invertebrates. They range in size from microscopic soildwelling insects to large beetles and butterflies but they all share certain common features. Insectpest management and control the national academies press. Identification and classification insectpest management. It is certainly no accident that insects are the most abundant and most diverse group of organisms on earth. Entomology the study of insects dominant groups of animals on earth today life on earth. Insect flight has been a topic of great interest in aerodynamics due partly to the inability of steadystate theories to explain the lift generated by the tiny wings of insects. Taxonomy is the day today practice dealing with organism kinds, handling and identification of specimen, publication of data, study of literature and analysis of.
Insects or insecta from latin insectum are hexapod invertebrates and the largest group within. Here, well learn about one of the most versatile groups of organisms on earth and the different types of. Pdf the yukon territory provides a setting for its fauna of particular historical and ecological interest. In fact, there are so many insects that no one knows quite how to count them all the. Introduction to entomology nebraska extension university of.
Students are able to use these cards to think about which critters are insects and the characteristics that make them an insect. As the name, diptera indicates, most true flies have just one pair of functional wings. Biology characteristics of insects an introduction. They have strong biting mouthparts with which to chew seeds, wood or leaves. These characteristics are easily visible and do not require a microscope. Insect, class insecta or hexapoda, any member of the largest class of the phylum arthropoda, which is itself the largest of the animal phyla. Some insects are very helpful in destroying injurious insects. Posterior spiracles are found on the last abdominal segment. What is the character sketch of charley in the third level by jack finney.
Most insects have five basic physical characteristics. Insects insecta are the most diverse of all animal groups. Insects are cold blooded and have six legs, three main body parts and an exoskeleton. Hymenoptera is a large order of insects, comprising the sawflies, wasps, bees, and ants.
Insects have segmented bodies, jointed legs, and external skeletons exoskeletons. Teach your primary students about insects what is an insect, parts of an insect, different kinds of insects, characteristics of bugs with these printable minibooks or emergent readers. Usually one pair of antennae and a pair of compound eyes a few exceptions to these characteristics are found usually two pairs of wings absent in many insects such as lice, fleas, ants. This game is a very simple sorting activity in which students take turns selecting a card, naming the critter, and then dec. Characteristics and facts about flies diptera insects. Many of the crop varieties that were developed during the past 30 years produced high yields, but. Use features like bookmarks, note taking and highlighting while reading characteristics of the insect orders. Insects that go through this change include butterflies, true flies and beetles. A pair of modified wings called halteres replace the hindwings. Beneficial insects predators catch and feed on other creatures prey ground beetles lace wings and lady bugs parasites live on or in the bodies of living organisms hosts host are usually larger and stronger than the parasites and are not killed promptly parasitic wasps of aphids and hornworms. They are adaptive, mutable pioneers that have evolved to fill nearly every terrestrial niche, and they are legion. There are two compound eyes and two antennae, or feelers, on insects heads. From the dawn of landbased life, insects have been natures great explorers and colonizers. The hymenoptera order of insects contains a very diverse group of insects that are not only important as pollinators in the case of bees and social wasps, but also as pest control in the case of predatory and parasitic wasps.
In this article we will discuss about the economic importance of insects. All types of parasites show peculiar adaptations to survive in or on the host system and to get maximum benefit from them. The main difference between bugs and insects is that bugs are the insects having proboscis, which can be used to suck food whereas insects have other mouthparts adapted for chewing or sponging. The type of damage caused can provide evidence of the culprit. Females typically have a special ovipositor for inserting eggs into hosts or places that are otherwise inaccessible. Termites are usually small or medium sized, whitish or colourless insects, with short antennae. The insect order diptera consists of the insects commonly known as true flies, mosquitoes, midges and gnats. There are insects that produce useful products, for example honey honey bee or silk silkworm. Taxonomy and classification of insects academicscope. Apis, the honeybees produce millions of tons of honey every year, it also gives bees.
Classification of insects refers to the arrangement of insects into groups and the groups into systems called classification taxonomy this is the science of identifying, naming and classifying organisms. I emphasize the characteristics of insects that were highlighted in the response and ask the students to add any that were not identified. Characteristics of the insect orders kindle edition by laura smith. Insects are distinguished from other arthropods by their body, which is divided into three major regions. The halteres connect to a nervefilled socket and work much like a gyroscope to keep the fly on the course and stabilize its flight.
Class insecta contains all insects and belong to the phylum arthropoda. Insect orders with a complete life cycle conventionally, insect orders are studied from those which are considered to be the most primitive, progressing through those which are more advanced ies, moths, bees, and beetles. This order is made up of families that contain over 98,000 species. General characteristics and classification of arthropoda arthropoda arthon jointed. There are about a million species of insect and many more yet to be discovered. It is a phylum of triploblastic, haemocoelomic, segmented invertebrates having head, thorax and abdomen, a chitinous exoskeleton and jointed legs and appendages. Certain predatory and parasitic insects can detect the characteristic sounds made. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
Apart from the hymenoptera bees, ants and wasps, termites are the only insects that live in social groups. Pdf wetting characteristics of insect wing surfaces. Introduction to the identification of insects and related arthropods 2003 p. All habitats except saltwater replaced by crustacea there a. Since all flies have only two wings, they are then grouped as insects of the order diptera which literally translates to two wings. General characteristics and classification of arthropoda. Other insects are beneficial because they help with the pollination of plants, e. Without the activities of insects, human life on earth would eventually be extinguished. Learn more about insects, both their similarities and their differences. Oct 14, 2019 as the name, diptera indicates, most true flies have just one pair of functional wings. Students will classify animals as insects based on number of legs.
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