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Insects are a class within the arthropods that have a chitinous exoskeleton, a three-part body (head, thorax, and abdomen), three pairs of jointed legs, compound eyes, and two antennae. They are among the most diverse group of animals on the planet and include more than a million described species and represent more than half of all known living organisms. Insects may be found in nearly all environments, although only a small number of species occur in the oceans, a habitat dominated by another arthropod group, the crustaceans.


Types of Insects

Insects are basically charaterized into 10 broad groups, here is the list of all its varieties:


  • American House Spider
  • Black Widow Spider
  • Black-and-yellow Garden Spider
  • Black-legged Tick
  • Carolina Wolf Spider
  • Daddy-long-legs
  • Desert Tarantula
  • Giant Hairy Scorpion
  • Goldenrod Spider
  • Green Lynx Spider
  • Windscorpions


  • Convergent Lady Beetle
  • Firefly
  • Japanese Beetle
  • Long-jawed Longhorn Beetle
  • May Beetles
  • Red Milkweed Beetle
  • Rose Weevil
  • Six-spotted Green Tiger Beetle
  • Ten-lined June Beetle
  • Two-spotted Lady Beetle

Butterflies and Moths

  • American Copper
  • Anise Swallowtail
  • Black Swallowtail
  • Bumblebee Moth
  • Cabbage White
  • Cecropia Moth
  • Clouded Sulphur
  • Common Checkered-Skipper
  • Eastern Tent Caterpillars
  • Eastern Tiger Swallowtail
  • Fiery Skipper
  • Gray Hairstreak
  • Gypsy Moth
  • Hummingbird Moth
  • Imperial Moth
  • Long-tailed Skipper
  • Luna Moth
  • Monarch
  • Mourning Cloak
  • Ornate Tiger Moth
  • Polyphemus Moth
  • Red Admiral
  • Sara Orangetip
  • Silver-spotted Skipper
  • Spring Azure
  • Tomato Hornworm
  • Viceroy
  • White-lined Sphinx
  • Woolly Bear Caterpillar Moth
  • Zebra Swallowtail

Centipedes and Pillbugs

  • House Centipede
  • Pillbug

Cicadas, Dobsonflies, and Kin

  • Dogday Harvestfly
  • Eastern Dobsonfly
  • Green Lacewings
  • Periodical Cicadas
  • Scarlet-and-green Leafhopper

True Bugs

  • Assassin Bugs
  • Common Water Strider
  • Green Stink Bug
  • Small Milkweed Bug
  • Squash Bug


  • American Horse Fly
  • American Hover Fly
  • Black Flies
  • Black Horse Fly
  • Blue Bottle Fly
  • Common Midge
  • Crane Flies
  • Deer Flies
  • Giant Crane Fly
  • House Fly
  • House Mosquito

Grasshoppers, Crickets, and Kin

  • American Cockroach
  • Carolina Locust
  • Carolina Mantid
  • Differential Grasshopper
  • Field Cricket
  • Fork-tailed Bush Katydid
  • German Cockroach
  • House Cricket
  • Jerusalem Cricket
  • Northern Walkingstick
  • Praying Mantis
  • Snowy Tree Cricket
  • True Katydid

Mayflies, Dragonflies, and Damselflies

  • Atlantic Bluet
  • Common Green Darner
  • Common Whitetail
  • Eastern Forktail
  • Ebony Jewelwing
  • Flame Skimmer
  • Mayflies

Social Insects

  • American Bumblebee
  • Bald-faced Hornet
  • Eastern Subterranean Termite
  • Honey Bee
  • Little Black Ant
  • Paper Wasps
  • Yellow Jacket

Ten Facts about Insects

  1. Insects are arthropods, a type of invertebrate, animals that lack a backbone.
  2. Insects are the only invertebrates to have developed flight, and this has played an important part in their success.
  3. Many insects are valuable as predators on the harmful species, and some are important as scavengers and as aerators of the soil.
  4. Insects are of aesthetic importance some insects, such as dragonflies, beetles, and butterflies, are widely thought to be among the most beautiful of all animals.
  5. Insects range in length from the feathery-winged dwarf beetle, which is barely visible to the naked eye at 0.25 mm (0.01 in), to the walkingstick of Southeast Asia, which measures up to 50 cm (20 in) with its legs stretched out.
  6. Insect exoskeletons are highly effective as a body framework, but they have two drawbacks: they cannot grow once they have formed, and like a suit of armor, they become too heavy to move when they reach a certain size.
  7. Insects comprise the most diverse group of animals on the earth, with around 925,000 species described. More than all other animal groups combined.
  8. Insects may be found in nearly all environments on the planet, although only a small number of species have adapted to life in the oceans where crustaceans tend to predominate.
  9. Insects commonly regarded as pests include those that are parasitic (mosquitoes, lice, bedbugs), transmit diseases (mosquitos, flies), damage structures (termites), or destroy agricultural goods (locusts, weevils).
  10. Insects are found throughout the world except near the poles and pervade every habitat except the sea.

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