🐞 Bugs – Insects and Arachnids
🌍 Where are bugs found?
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Bugs are everywhere—indoors and outdoors, all year round.
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They include insects (like ants, flies, bees) and arachnids (like spiders, ticks, scorpions).
🐜 Insects
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Most common type of animal on Earth (10 quintillion alive at once!).
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Over 91,000 insect species known.
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Body has 3 parts: head, thorax, abdomen.
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Have 6 legs, antennae, hard outer skeleton (chitin), and many have wings.
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Have compound eyes (many lenses).
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Examples: butterflies, beetles, grasshoppers, ants, bees, termites.
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Social insects (ants, bees, termites):
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Queen lays eggs.
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Workers build nests and gather food.
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Males mate then die soon after.
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🕷️ Arachnids (like spiders)
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Belong to a different group than insects.
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Over 100,000 arachnid species known.
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Body has 2 parts: cephalothorax + abdomen.
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Have 8 legs (not 6), simple eyes, no wings, no antennae.
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Spiders spin webs using spinnerets and use venom to paralyze prey.
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Ticks and mites are pests (bloodsuckers).
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Spiders are mostly harmless and helpful (eat insects).
✅ Key Differences
| Feature | Insects 🐜 | Arachnids 🕷️ |
|---|---|---|
| Body parts | 3 (head, thorax, abdomen) | 2 (cephalothorax, abdomen) |
| Legs | 6 | 8 |
| Antennae | Yes | No |
| Eyes | Compound eyes | Simple eyes |
| Wings | Some have wings | None |
| Examples | Ant, butterfly, fly | Spider, tick, scorpion |
🌟 Summary
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“Bugs” include both insects and arachnids.
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Insects: 3 body parts, 6 legs, many species, some live in colonies.
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Arachnids: 2 body parts, 8 legs, no wings or antennae, includes spiders, ticks, scorpions.
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Both can be pests, but many (like spiders and bees) are also helpful to the environment.
QUIZ
