They would do the exact same as humanity given the tech. Natural organism doing natural things.

https://en.wikipedia.org/wiki/Henderson_Island_(Pitcairn_Isl...

For context, if one missed it:

https://en.wikipedia.org/wiki/Make_Love,_Not_Warcraft

The scorpions and cockroaches will have to fight it out. Life will go on.

Scorpions had a turn when the giant ones preyed on our lungfish ancestors.

This is our turn; eg, similarly dinosaurs preying on proto-mammals and our abuses of avians.