Knowledge, Nature
This material is Open Game Content, and is licensed for public use under the terms of the Open Game License v1.0a.
(Animals, fey, giants, monstrous humanoids, plants, seasons and cycles, weather, vermin)
Synergy
If you have 5 or more ranks in Knowledge (nature), you get a +2 bonus on Survival checks made in aboveground natural environments (aquatic, desert, forest, hill, marsh, mountains, or plains).
(If you have 5 or more ranks in Survival, you get a +2 bonus on Knowledge (nature) checks.)