Bee

The Bee was seen in the episode "Evicted!," when Jake, along with Finn, tried to move into its hive by sticking his foot into the entrance. The bee barfed honey on both of them to scare them away. Later, at Finn and Jake's cave party, the bee can be seen flying into Mr. Cupcake's frosting and getting stuck in it.

Trivia

 * A similar-looking bee appears in the closing credits. It seems much happier and may be a different bee.
 * Unlike normal bees, this bee has no antennae.
 * A similar-looking bee is seen in the title card for "Death in Bloom," but that may also be another bee.