Knowledge (nature) covers animals, fey, monstrous humanoids, plants, seasons and cycles, weather, and vermin.

Knowledge (nature) task DC
Identify natural hazard 15 + hazard's CR
Identify a common plant or animal 10
Identify unnatural weather phenomenon 15
Determine artificial nature of feature 20
Identify an animal creature's abilities and weaknesses 10 + monster's CR
Identify a fey creature's abilities and weaknesses 10 + monster's CR
Identify a monstroud humanoid creature's abilities and weaknesses 10 + monster's CR
Identify a plant creature's abilities and weaknesses 10 + monster's CR
Identify a vermin creature's abilities and weaknesses 10 + monster's CR