Mosquito
Mosquitoes of the genus "Toxorhynchites" never drink blood. This genus includes the largest extant mosquitoes, the larvae of which prey on the larvae of other mosquitoes. These mosquito eaters have been used in the past as mosquito control agents, with varying success.
Euscorpius
The species range in colour from yellow-brown to dark brown. Many are brown with yellow legs and stinger. The largest is "E. italicus" at 5 cm (2 in), and the smallest is "E. germanus" at 1.5 cm (0.6 in). The venom of "Euscorpius" species is generally very weak, with effects similar to a mosquito bite. Some smaller specimens may not even be able to puncture the human skin with their stings.