Wiktionary
arboreally
adv. 1 In an arboreal manner 2 With regard to trees
Usage examples of "arboreally".
Wherever they could, dwellers went arboreally rather than on the ground.
About a meter tall if it stood erect, it must use its short, bowed legs arboreally by choice, for it ran on all fours and either foot terminated in three well-developed grasping digits.
Once we flew in the air, and once we dwelt arboreally and were afraid of the dark.