Giant Flying Fox

The Giant Flying Fox is a Hardmode Exclusive enemy that spawns only in the surface of the Jungle at night, in addition to the common Jungle Bats and in place of the Derplings that spawn during the day. Giant Flying Foxes can deal significant damage to a player and without any knockback resistance, can push players down jungle caves. They prove a threat to early Hardmode characters.

Trivia

 * In real life, a is any of several species in the family Pteropodidae, which are otherwise known as fruit bats.  These are the largest bats in the world, found mainly in the tropical regions of Asia.  Thus, it makes sense for this to be the largest in-game bat. The real-world versions are docile fruit eaters that are harmless to humans, but are serious agricultural pests. The fact that it drops Grapes might be inspired by this.
 * The Giant Flying Fox dropping Grapes is likely a reference to the fable of "The Fox and the Grapes", in which a fox attempts to reach some Grapes on a vine, but ultimately decides that they are undesirable.

History
Roussette géante 巨型飞狐