Corrupted Birds and Pigs

There are a total of 5 Corrupted birds.

Glitched Red
Glitched Red is a Corrupted Bird who appears first on Undermath 1-1. He can clip through even the hardest of block types, but only 3 times. He can be quite useful on stages like Undermath 3-1, where there is lots of stone and you have only Glitched Reds. His Corpse is just a normal Red Bird