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.
Muriqui
The muriquis, also known as woolly spider monkeys, are the monkeys of the genus Brachyteles. They are closely related to both the spider monkeys and the woolly monkeys. The two species are the southern ("B. arachnoides") and northern ("B. hypoxanthus") muriquis. They are the two largest species of New World monkeys, and the northern species is one of the most endangered of all the world's monkeys.