Arboreal
Traits
Climbing Arboreal creatures are great climbers and gain a climb speed equal to at least half their land speed. |
Flying Some arboreal creatures fly. You can give arboreal creatures a typical fly speed, as flying creatures find shelter high and plentiful in forests. |
Senses You can optionally add senses to an arboreal creature. Keen hearing is common among arboreal creatures, which can’t rely on sight in dense vegetation. You can grant them blindsense (scent) or blindsight (sound), generally with a 30-foot range. |
Skills Acrobatics, Athletics |
A creature is arboreal if it not only lives in forests but also lives primarily in the trees.
Source
Alien Archive 2 pg. 139