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🪲 Why There Are So Many Insects

Insects outnumber every other animal on Earth. Discover the clever tricks, tiny bodies, and big families that make them so successful.

lessons

~15 min

to learn

🔬 Science

subject

Ages 6–12

level

Start the course →

What you’ll learn

The Most Successful AnimalsLearn that insects are the most numerous animals, that beetles lead in species, and the main reasons for their success.Insects are the most numerous and varied animals on Earth, with around a million named kinds and beetles alone making up over 350,000 species. Several advantages working together explain this success: small size, a protective exoskeleton, wings for spreading, huge numbers of eggs, and metamorphosis.
Built to SurviveExplore how small size, the exoskeleton, and flight help insects thrive everywhere.Being small means the world is full of tiny homes for insects, so many kinds can live close together. The exoskeleton protects them and keeps water in, letting insects survive even in dry places. Wings let insects spread to new places to live and feed, which has carried them across almost the whole planet.
Big Families, Big NumbersDiscover how huge egg numbers and metamorphosis push insect populations to enormous sizes.Many insects lay huge numbers of eggs, so even when most young are eaten, plenty survive and families grow fast. Metamorphosis means the young and adults eat different foods and do not compete, so more can survive together. All these advantages combine to make insects the most numerous animals on Earth.

Questions this course answers

Which animal group has the most different kinds, or species?

There are more species of beetle than any other kind of animal on Earth.

How does being small help insects be so numerous?

Because insects are small, the world is full of little homes where many kinds can live.

Besides protecting the body, what else does an insect's exoskeleton do?

The exoskeleton seals in water, so insects can survive in hot, dry places.

Why does laying lots of eggs help insects stay so numerous?

Laying huge numbers of eggs means that even when many young are eaten, plenty survive to keep the numbers high.

How does metamorphosis help more insects survive together?

Because the young and adults eat different foods, they do not compete, so more can survive.

How do wings help insects become so widespread?

Flight lets insects reach new places to live and find food, spreading them across the world.

Grounded in trusted sources

National Geographic Kids
Smithsonian Institution
Britannica Kids
BBC Bitesize

Every Wunder lesson is built from real, reputable sources — never invented.

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