My first encounter with one of them was when i was doing a quick check of the jungle (i imediatly move to the jungle island). With in one turn my only creature died all i saw was a flash of yellow. Apart from that i haven't encountered one.
I like the idea that they are top of the food chain and your not
These are very scary before you know about them, and also if you try to shake an "Ape Spawn Tree"? RUN. My poor foxcats didn't know what hit them, and the closest port was to Killer Island with 5 tiles. I am dead.