From LSWiki

Class: Fieldcraft Skills

Attribute: Intellect
Pedagogy: Procedural

This skill represents an overall, in-depth familiarity with the terrain of the skies -- 
the invisible currents of the air, updrafts and downdrafts and thermals, the architecture 
of clouds, and so on.  When in such terrain, this familiarity aids one in fighting, movement, 
and the use of a variety of skills, such as tracking, stealth, foraging, and elude.

Trainers

Shatterspire: Sthlar
Teryx: Nelar
Association required:
Hawkmen: Katar
Hawkmen: Shayera
Guild required:
Coven: Esme Wanders
Coven: Halea
Coven: Lynda Xenetha
Quest required