The world's biggest mosquito is the Toxorhynchites speciosus, which can grow to 1.5 inches in length. This mosquito belongs to the Toxorhynchites genus, commonly referred to as the "elephant mosquito."
The Toxorhynchites speciosus is endemic to the coastal regions in Australia. As intimidating as these mosquitoes may seem because of their size, they are not blood feeders and they are not attracted to humans. These mosquitoes feed on plant juices, nectar, honeydew and sap. Female Toxorhynchites speciosus are larger than the males. They have a shiny-metallic appearance, and a long and scaly proboscis, which it uses to feed on plant juices.
Toxorhynchites speciosus are also known as mosquito eaters because its larva feeds on the larvae of other mosquito species. This behavior of the Toxorhynchites speciosus is being studied and observed for its use as a means of controlling blood-sucking mosquito populations, especially the species that spread dangerous diseases like malaria and dengue fever.