Shadowrun Wiki

Nature Spirits are various types of spirits that can be conjured by shamans, witchs and druids.

They are dived in the major groups:

spirits of water 
which includes spirits of sea, river, lake, swamp and so on
spirits of heaven 
which includes spirits of fog, storm, thunderstorm and others
spirits of land 
which includes spirits of prairie, desert, woodland, mountains and others
spirits of man 
which includes spirits of the streets, hearth and field

Recently two more types of nature spirits were discovered:

spirits of beast
spirits of plant

In a poisoned, polluted and/or devastated place any of these types of spirits may become Toxic Spirits.