A Chattering of Outsects (otherwise known as an airborne Outsect Party).
Outsect Jet Pods are loosely based upon the Space Hopper. Unlike the Space Hopper, the Outsect version uses a small jet engine and shoots upwards. It is very likely that you have seen a partying group of Outsects on Jet Pods and assumed you were observing a flock of noisy birds. The Outsects use the collective term “Chattering” for any such airborne party.
The term is borrowed from feathery Chough parties “A group of choughs may be referred to fancifully or jocularly as a chattering or clattering.”