Cockroaches, also known as roaches, are generally medium to large sized insects. They can measure over 2 inches length, with tropical species tending to be larger. They have six spiny legs and two long antennae. Some species have wings however most winged cockroaches are not particularly adept at flying. The pest cockroaches can spread various diseases because they are commonly found near waste deposits or in the kitchen, where food is present. Others species of cockroaches are beneficial to the environment as important recyclers of decaying organic material, dead or dying plants and animals.