Characteristics of insects pdf

Characteristics of the insect orders kindle edition by laura smith. In this lesson, were going to be exploring the diverse class of insecta, or insects. The type of damage caused can provide evidence of the culprit. Insects have segmented bodies, jointed legs, and external skeletons exoskeletons. Some insects are very helpful in destroying injurious insects. Insects can be found in almost every ecosystem on earth insects are vital components of food webs 1. The halteres connect to a nervefilled socket and work much like a gyroscope to keep the fly on the course and stabilize its flight. A pair of modified wings called halteres replace the hindwings. It is a phylum of triploblastic, haemocoelomic, segmented invertebrates having head, thorax and abdomen, a chitinous exoskeleton and jointed legs and appendages. All bugs are insects but, all insects are not bugs.

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. Some insects go through a complete metamorphosis, meaning they grow into completely different creatures than they were in their larval stage. 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. General characteristics and classification of arthropoda arthropoda arthon jointed. Pdf wetting characteristics of insect wing surfaces. Insects or insecta from latin insectum are hexapod invertebrates and the largest group within. 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. Posterior spiracles are found on the last abdominal segment. There are about a million species of insect and many more yet to be discovered. Entomology the study of insects dominant groups of animals on earth today life on earth.

True bugs belong to the order hemiptera under the class insecta. Entomology 101 the insects washington state university. I emphasize the characteristics of insects that were highlighted in the response and ask the students to add any that were not identified. This order is made up of families that contain over 98,000 species. Use features like bookmarks, note taking and highlighting while reading characteristics of the insect orders. They are adaptive, mutable pioneers that have evolved to fill nearly every terrestrial niche, and they are legion. Most insects have five basic physical characteristics. Taxonomy and classification of insects academicscope. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

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. Introduction to the identification of insects and related arthropods 2003 p. Insects have a hard protective covering called an exoskeleton. There are more species of insects than there are species of all other animals combined. 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. Students are able to use these cards to think about which critters are insects and the characteristics that make them an insect. Insects are distinguished from other arthropods by their body, which is divided into three major regions.

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. There are two compound eyes and two antennae, or feelers, on insects heads. 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. Adult insects have three pairs of legs, and most have two pairs of wings. The insect order diptera consists of the insects commonly known as true flies, mosquitoes, midges and gnats. Females typically have a special ovipositor for inserting eggs into hosts or places that are otherwise inaccessible. Insect, any member of the class insecta hexapoda, the largest class of phylum arthropoda, about 1 million species or threefourths of all animals. Because they lack backbones, they are invertebrates. Insects that go through this change include butterflies, true flies and beetles. They have strong biting mouthparts with which to chew seeds, wood or leaves. Terminology, classification and use of scientific names.

Here, well learn about one of the most versatile groups of organisms on earth and the different types of. Modern humans200,000 years insects350 million years 100,000 different species live in north america. The class hexapoda is generally studied under a classification system with approximately 30. 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. Learn more about insects, both their similarities and their differences. In the process of artificially selecting suitable crops for human consumption, highly susceptible plants for infestation by insects are also selected. General characteristics and classification of arthropoda. Apart from the hymenoptera bees, ants and wasps, termites are the only insects that live in social groups. Termites are usually small or medium sized, whitish or colourless insects, with short antennae. Download it once and read it on your kindle device, pc, phones or tablets. I prefer to go in the opposite order, because the more advanced orders are more commonly.

Introduction to the identification of insects and related. Hymenoptera is a large order of insects, comprising the sawflies, wasps, bees, and ants. Insects have what we call an exoskeleton or a hard, shelllike covering on the outside of its body. They have maintained a position of ecological preeminence for over 400 million years. 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. 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. General characteristics of parasites easybiologyclass. What is the character sketch of charley in the third level by jack finney. But none have all the same traits that insects share. It is not the primary means of moving oxygen and carbon dioxide. In fact, there are so many insects that no one knows quite how to count them all the. There are insects that produce useful products, for example honey honey bee or silk silkworm. All types of parasites show peculiar adaptations to survive in or on the host system and to get maximum benefit from them. Introduction to entomology nebraska extension university of.

Most insects have 4 wings, but flies only have two, and their wings can beat up to about 200 times per second. Here are 10 traits that make insects thrive when other animals cant. Insect classification hierarchal system of classification. We then move back to our seats for independent practice.

Insects insecta are the most diverse of all animal groups. In order to examine the wetting characteristics on a rough surface, a biomimetic surface with microscale pillars is fabricated on a silicon. Pdf the yukon territory provides a setting for its fauna of particular historical and ecological interest. That means they have a hard exoskeleton, or shell, on the outside of their bodies that protects them.

As the name, diptera indicates, most true flies have just one pair of functional wings. In this article we will discuss about the economic importance of insects. Insects which produce honey, wax, lac, dyes and silk are commercially beneficial. 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. Oct 14, 2019 as the name, diptera indicates, most true flies have just one pair of functional wings. If an insect is not a pest and not beneficial than we can call it neutral. Without the activities of insects, human life on earth would eventually be extinguished. Go to the tab that best exemplifies the damage observed on.

From the dawn of landbased life, insects have been natures great explorers and colonizers. Insects that go through an incomplete metamorphosis look very similar to adults of the same species, only smaller. 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. The insects with complex social structures of this order are fascinating to observe and learn from. Identification and classification insectpest management.

They range in size from microscopic soildwelling insects to large beetles and butterflies but they all share certain common features. This game is a very simple sorting activity in which students take turns selecting a card, naming the critter, and then dec. Insects are cold blooded and have six legs, three main body parts and an exoskeleton. There is no hemoglobin in insects except in immature chironomus spp.

Insect, class insecta or hexapoda, any member of the largest class of the phylum arthropoda, which is itself the largest of the animal phyla. 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. If you use live animals for this lesson, you may want to keep. 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. Students will classify animals as insects based on number of legs. Objectives students will identify the head, thorax, and abdomen on pictures of insects. Pdf insects are small creatures that are unavoidable by humans and other animals. 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 range in size from microscopic soildwelling insects to large beetles and butterflies.

The role of blood in insects is the transport of nutrients, wastes, and hormones. Biology characteristics of insects an introduction. These characteristics are easily visible and do not require a microscope. Many of the crop varieties that were developed during the past 30 years produced high yields, but. Apis, the honeybees produce millions of tons of honey every year, it also gives bees.

It is the most diverse group of organisms on earth. Sometimes a magnifying glass or a microscope is needed. They include, for example, ants, bees, wasps, beetles, butterflies, dragonflies and fleas. Choate much of our usual appreciation of an animal in any condition depends on our ability to identify and name it. Without the activities of insects, human life on earth would. It is certainly no accident that insects are the most abundant and most diverse group of organisms on earth. Since all flies have only two wings, they are then grouped as insects of the order diptera which literally translates to two wings.

Insectpest management and control the national academies press. In this article we will discuss about the growth and metamorphosis in insects. 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. Dec 12, 2017 all bugs are insects but, all insects are not bugs. Certain predatory and parasitic insects can detect the characteristic sounds made. Characteristics and facts about flies diptera insects. Over 150,000 living species of hymenoptera have been described, in addition to over 2,000 extinct ones. Other insects are beneficial because they help with the pollination of plants, e. This family also includes gnats, deer flies, horse flies, botflies and blow flies. Insects represent one class of animals within the phylum arthropoda. All habitats except saltwater replaced by crustacea there a. Insects class insecta have segmented bodies, jointed legs, and external skeletons.