Stick insects are in the order Phasmatodea (sometimes called Phasmida). The name comes from the Greek word phasma, meaning a phantom or ghost, because the insects look like sticks or leaves..

Stick insects belong to the family of Phasmatidae, while leaf insects belong to Phylliidae.

Both are from the order of Phasmatodea, and are therefore easily confused. For example, Extatosoma Tiaratum is commonly known by the name 'Spiny Leaf Stick Insect'. Having 'Leaf' in the name can confuse it with the family Phylliidae, though it's actually a Phasmid. For this reason, when researching, and writing reports, it's important to be certain of which family an insect belongs to.

If you want a simple answer, stick insects tend to look more like sticks, and leaf insects like leaves, though again, they can be easily confused.

"Leaf insects", or order Phasmida resemble leaves. There are many different species. Also, some other insects may look like leaves.

a privet leaf is leaves that stick insects eat !

stick insects r thinner & have legs.