Since there is a plant lore, why not a beast lore skill. Similar to plant
lore, it would provide general information
about beasts in the outer world including the type of terrain one might
happen upon the particular beast. High percent of beast lore might
allow a slight bonus to the tame mount skill and/or calm animal skills.
Things like Apes are most commonly found in jungles, wolve all terrains,
whether they are nocturnal/diurnal, herbivore, carnivore, omnivore, etc.
Maybe also make it add to the make mount feed where it satiates/refreshes
the target creature.