noun
leaf insect; Phyllium pulchrifolium
Refers to leaf insects, especially the species Phyllium pulchrifolium. A biological term, but commonly known.
コノハムシは葉っぱにそっくりだ。
The leaf insect looks exactly like a leaf.
Compound of 木の葉 (このは, 'leaf of a tree') + 虫 (むし, 'insect'). The name directly describes its leaf-like camouflage.