Only female mosquitoes bite humans and animals. Male mosquitoes primarily feed on plant nectar and other sources of sugar. The female mosquito requires a blood meal to obtain the necessary nutrients for egg development. When a female mosquito bites, it injects saliva into the skin, which contains an anticoagulant to prevent blood from clotting. It’s this saliva that causes the itchy reaction we experience after being bitten. So the next time you get a mosquito bite, you can blame it on the females!