Because life is pain and RHD plentiful, have another update!
It's a swarm, it's tiny (which is the worst size a swarm can have), it consists of animals, and it's got eleven RHD. Its sole interesting ability is Wounding, which is hilariously insignificant at this level.
Seriously though: just play a bat swarm and get basically the same package with flight, immunity to weapon damage, blindsense, and eight less RHD.
Obvious -0, Jurassic Park II reference value aside.