>>511010855
Just gather up a load of your own species and send them to where this one came from. Eco-swap.
Invasive pests always do better, regardless of where it is. You would think an established ecosystem would be resistant, be able to find a balance and block out disruptions, but the truth is that nature gets lazy and complacent. The foreign always supplants the native. That's why you have to leave and go invade their land, which will wind up being very easy to do.