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.
Nacunda nighthawk
The nacunda nighthawk is not only the largest of the highly aerial nightjars known as nighthawks and the largest species of nightjar in the neotropics, it is one of the largest species in the world. Its length, at , is somewhat less than the great eared-nightjar, which is typically considered the largest species in the family, but the nacunda may actually weigh a bit more on average. Six specimens of nacunda nighthawk were found to average in body mass, with range of . Its very large size, large head, and pale body with highly contrasting black primaries make the nacunda nighthawk easy to identify.