In some species however, wings that are vestigial in the sense of not retaining any function related to flight, may have other functions, such as organs of aposematic display in some Orthoptera and Phasmatodea.
Within the glasshouses tropical rainforest flora, desert plants and species from the Mediterranean are on show as well as tropical insects such as stick insects, scorpiones, butterflies and tarantulas.
There are several species of Phasmatodea which this common may apply to.
Phasmatodea, the insect group which contains stick insects and walking-sticks
The Illinois Nature Preserves Commission advises visitors to be on the lookout for bluebirds, western hognose snakes, and prairie walking stick insects.
Conlephasma enigma is a wingless, ground-dwelling species of stick insect in the genus Conlephasma, and is found on on Mount Halcon, on the Philippine island of Mindoro.