Humans are vulnerable to three species of lice: head lice clothing lice and crab lice Read more
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Lice
Humans are vulnerable to three species of lice: head lice clothing lice and crab lice
Ticks
They not only steal a meal, but hitch a lift while they're doing it
Leeches
The leech carries its own anaesthetic so its prey isn't even aware it's feeding
Fleas
Facts and figures about the bloodsucking insect
