One time, while I was exploring, I was attacked by a mix of titanoboas and these little fucks while I was landing for stamina on my pteranodon. Lucky for me, my previous base was on a snowy mountain in the center, and I was still trying for the mind wipe tonic. I still died, (because of sheer numbers) but I stayed awake for quite a while because of my fortitude being around 50. I say that if you encounter these things, buff your fortitude a bit, and you might be able to take them on

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