hind wings in a sentence

1. They do not fly; both their forewings and hind wings are functionally nonexistent.

2. Gryllus firmus exhibits wing polymorphism ; some individuals have fully functional, long hind wings and others have short wings and cannot fly.

3. the elytra do not function as wings, but when the beetle is airborne, they spread out and act as aelerons rather than as true wings. when at rest, they cover and protect the delicate and membranous hind wings, which are folded and tucked under the elytra in a complicated manner.