Ants have tiny magnetic compasses in their antennae which help them navigate.
9
Some older/less efficient worker termites will develop 'backpacks' of toxic chemicals that explode when the termite is threatened. They are essentially used as suicide bombers when the colony is being attacked.
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Mosquitoes don't just bite you, they also pee on you.
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Moths are unable to fly during an earthquake.
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When a male honey bee climaxes during sex, his testicles explode and then he dies.
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The pea aphid insect explodes itself thereby sacrificing its life to protect its relatives from predators.
3
Queen ants have one of the longest life-spans of any known insect - typically up to 30 years. Western harvester ant queens can live up to 40 years!
2