The Butterfly's Revenge

Overview
The Butterfly's Revenge is an Expert Difficulty Track in BTD6. It's based on the Butterfly Track from BMC, only harder. It is unlocked at Rank 42.

Track Description
It's similar to the Butterfly Map, but shorter. It also has two places where the Bloons can take a short or long path, adding to the difficulty.

Trivia

 * This is a grassy area, while the original Butterfly was set in a forest.