Bonsect

Bonsect is an enemy from Mega Man Zero 4. It is a caterpillar-like Mechaniloid that slowly homes in on Zero. It comes in different lengths and appears out of enclaves in the walls or simply out of thin air. It appears in Noble Mandrago's stage, Popla Cocapetri's stage, and Craft's second stage, as well as during the final battle with Dr. Weil (the latter summoning them via green portals).