Mega Nest

Mega Nests are an immobile enemy in Mega Man X4 that appear in Web Spider's stage. They spawn Kyunbyunn, and in the very few times you encounter one, they hang from the ceiling like bee hives. 

Kyunbyunn
Kyunbyuun (キュンビューン) is a wasp-like enemy that appears in Web Spider's stage. It also appear without the Mega Nest in Mega Man Xtreme 2 with much of the same attacks. They come out of the Mega Nest and attack by flying towards X or Zero. 

Similar enemies

 * Kyuun B
 * Bomb Been