There are different types of mosquitoes found throughout the world, including all regions of the U.S. They are an annoyance to most because of the itchy mosquito bites they leave behind, but they can also pose a far more serious threat. In fact, mosquitoes are often described as one of the deadliest animals in the world due to the diseases they can transmit. According to the World Health Organization (WHO), mosquito bites result in the deaths of more than 1 million people every year – the majority of these deaths are due to malaria.