The skarr in silksong are red ants, that focus a lot on hunting, and prefer a damp, warm area (Look at how verdant Hunter's March & Far field are... and it's located under water areas like Greymoor).
They also have Major/supermajor ants, so they are a species with cast dysmophism.
As far as I am in the game, none have shown a stinger attack, which make me think they do not have one.
Right now I think they could be Pheidole Ants, but I'm still not sure if there are Pheidole species that like damp area. Then again, Pheidole are very diverse genus, so it's not impossible.













