noun, noun which may take the genitive case particle 'no'
up in a tree; in the trees
Refers to a location or state of being in or on a tree, often used in descriptive or scientific contexts. The cross-reference 樹下 (under a tree) highlights the contrast.
See also: 樹下
樹上で休むサルを見つけた。
I found a monkey resting up in a tree.
樹上の生活に適応した動物も多い。
Many animals are adapted to life in the trees.