By casting this spell, the Druid is able to survey the area before him, up to the maximum range of the spell, and determine whether the flora and fauna within it are natural or not. 'Unnatural' predatory plants such as damaging moulds and fungi, Illusionary Woods, Lycanthropes, and similar illusions will be seen for what they really are. The presence of Elementals is always detected. The spell does not confer upon the Druid any ability to detect traps, such as snares or pits, or details of natural flora and fauna which are unfamiliar to him.