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.
Comet moth
The comet moth or Madagascan moon moth ("Argema mittrei") is a moth native to the rain forests of Madagascar. The species was first described by Félix Édouard Guérin-Méneville in 1847. The male has a wingspan of 20 cm and a tail span of 15 cm, making it one of the world's largest silk moths. The female lays from 120-170 eggs, and after hatching, the larvae feed on "Eugenia" and "Weinmannia" leaves for approximately two months before pupating. The cocoon has numerous holes to keep the pupa from drowning in the daily rains of its natural habitat. The adult moth cannot feed and only lives for 4 to 5 days. Although endangered in the wild due to habitat loss, the comet moth has been bred in captivity.