Nimbus Fields
17 forms13 speciesLv.5–15Breezy Plains
Wind 8
Fire 3
Grass 3
Dark 2
Lightning 2
Water 2
Earth 1
See Nimbus Fields on the map — its outline from the game client, its level band, and where each creature here spawns.
Habitat is the only spawn condition published for any of these. The store pages say creatures appear according to environment, weather, phenomena and time of day — and no source gives the other three for a single form. Nothing below is filtered by weather or time, because nobody knows how.
Found here
Sourced from the official wiki. Each species page shows the provenance and confidence of every field it carries.