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Why do mosquitoes bite?

Only female mosquitoes bite! They need the proteins in mammal blood to produce eggs. Mosquitoes have a battery of sensors to track their prey.

  • Chemical sensors - Mosquitoes can sense carbon dioxide and volatile compounds up to 100 feet. Mammals and birds give off these gases as part of their normal breathing. Certain chemicals in sweat also attract mosquitoes.
  • Visual sensors - Mosquitoes can see and orient towards potential blood meal that contrast with their background. The ability is enhanced when the potential host is moving.
  • Heat sensors - Mosquitoes can detect heat from warm blooded animals from short distances.
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