According to studies, mosquitoes have important receptors located in their antennae. This allows them to detect various human scents even from 100 feet away. Mosquitoes use scents as their primary indicators to identify their victim. Only female mosquitoes bite because they need the protein found in the blood to produce eggs. Since humans are slow, big, and smelly targets, we are the easiest targets for them. Mosquitoes are attracted to human scents especially to the scent and volume of the carbon dioxide that we exhale. Our body odor also attracts mosquitoes. Other scents that draw this blood-sucking insect close are secretions, lactic acid, and blood type. Mosquitoes are very attracted to type O blood type and least attracted to type A blood type.