Yes. You can start learning on Learnr for free. Learnr Pro unlocks higher daily limits and extra features.

Learn Entomology

Six legs, three body parts, and the most diverse group of animals on Earth.

Free to start. Built from a single prompt. No credit card.

Entomology is the scientific study of insects, the animals with a head, thorax and abdomen, six jointed legs and, in most adults, wings. Insects pollinate crops, recycle dead matter, spread disease and feed countless other animals, so the field reaches into farming, medicine and ecology. You start by learning insect anatomy and the big orders, like beetles, flies, moths and butterflies, bees and wasps, and true bugs. Learnr builds an entomology course around your interests and teaches it in quick interactive lessons, from wing venation to metamorphosis.

How to learn Entomology, step by step

Learn the insect body plan. Memorize the three tagmata, the six legs on the thorax, and the paired antennae. Then check every bug you see: spiders have eight legs and two body regions, and pill bugs are crustaceans, not insects at all.
Study mouthparts and wings closely. Chewing mandibles, piercing-sucking beaks, sponging pads and coiled proboscises each signal a lifestyle. Wing structure gives most order names, such as Coleoptera for sheathed wings and Diptera for flies with one pair plus halteres.
Separate the two kinds of metamorphosis. Holometabolous insects go egg, larva, pupa, adult, while hemimetabolous ones grow through nymph stages that resemble small adults. Raising caterpillars or mealworms at home lets you watch a full cycle in a few weeks.
Get to order level in the field. Aim to name the order of anything you find before chasing species. Beetles, flies, true bugs, ants, bees and wasps, moths and butterflies, grasshoppers and dragonflies cover most of what turns up in a backyard.
Practice with keys and community tools. Work through a dichotomous key with a hand lens, and post clear photos to iNaturalist or BugGuide for expert feedback. Note where and when you found each insect, because habitat and season narrow identifications fast.
Build vocabulary a little at a time. Terms like elytra, spiracle and ovipositor pile up quickly. Short daily Learnr sessions pair each word with a picture and a quiz, so you can recognize the structures when you finally look through a lens.

What you'll learn

Tell insects apart from spiders, mites, centipedes and other arthropods
Identify the major insect orders by wings, mouthparts and body shape
Explain complete and incomplete metamorphosis with real examples
Use a dichotomous key to bring a specimen to order or family
Describe the roles insects play as pollinators, decomposers and pests

What's inside your Entomology course

A sample path Learnr builds for Entomology. Your real course adapts to your goal and level.

1. Arthropods and what makes an insect
2. External anatomy: segments, mouthparts and wings
3. Growth and metamorphosis
4. The major orders and how to recognize them
5. Insect ecology, pollination and pests
6. Collecting, photographing and identifying insects

How long does it take to learn Entomology?

Recognizing the major orders and understanding insect anatomy and life cycles takes roughly 1 to 3 months at a few hours a week. Confident family-level identification needs a season or two of fieldwork, and species-level expertise in a single group can take years.

What you need before you start

No prior science is needed. A hand lens, a phone camera and a notebook make practice much easier, and basic biology vocabulary helps.

Common mistakes to avoid

Calling every small crawling thing a bug. In entomology, true bugs are only the order Hemiptera, with piercing-sucking mouthparts.
Trying to name species from a blurry photo. Get the order first, then family, and record location, date and size alongside every picture.
Collecting in parks or reserves without checking rules. Many protected areas require permits, and some species are legally protected.

How Learnr builds your course

Type your topic

Tell Learnr you want to learn Entomology, or get as specific as you like.

Get a personalized course

Learnr instantly builds a full Entomology course tailored to your goal and skill level.

Learn and level up

Move through bite-sized lessons and interactive practice, earning XP and keeping your streak.

Entomology questions, answered

Are spiders studied in entomology?

Spiders are arachnids, not insects, so strictly they belong to arachnology. Many entomology courses and departments still cover them alongside ticks and mites because of their practical importance.

Which insect order has the most described species?

Beetles, order Coleoptera, have more described species than any other insect order. Some researchers think flies or wasps may rival them once undescribed species are counted.

What can you do with entomology?

Entomologists work in agriculture and pest management, public health on mosquitoes and ticks, forensic science, museums, conservation and research. Most professional roles require a degree in biology or entomology.