Tengu Lore Feat 1
Source Pathfinder Advanced Player's Guide
You learned skills for surviving in the place where your people were dispersed. You gain the trained proficiency rank in Society and Survival. If you would automatically become trained in one of those skills (from your background or class, for example), you instead become trained in a skill of your choice. You also become trained in Tengu Lore.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
TenguA creature with this trait is a member of the tengu ancestry. Tengus are humanoids who resemble birds. An ability with this trait can be used or selected only by tengus. An item with this trait is created and used by tengus.