The hind wings join to the fore wings with a row of tiny hooks. Cockroaches Cockroaches are fast-running insects often with wings. A few well known species have successfully evolved to exploit human dwellings and food supplies. Including insects, this huge group contains animals often mistaken for insects such as spiders and centipedes. Flies Diptera means two wings.
Flies do very well with their single pair of fore wings.
The hind pair are often reduced to a couple of knob-like balance organs. Wings of these insects are constructed with an elaborate network of supporting veins. Apart from jet propulsion, the aquatic nymph often possesses an extendable jaw capable of catching prey some distance away from the rest of the head. These insects often have a pair of elongated and thickened forewings and a membranous hind pair.