Grumbles are matured giggles. also grumble has kids. screech and giggle. When grumbles see or hear players. They do a laugh and for the damage a grumble gives them -50 health.
Grumbles camp anchors. The Queen patrols intruders in the nest. According to LSPLASH, the creator of doors. Screeches are a seek controlled giggles. There is a legendary chance a giggle egg is black. And layed in the queen. And it is a 0.01% chance of it laying. This was made up. This is fictional.