In the United States, there are about fifty different types of cockroaches. Cockroaches tend to inhabit dark, warm, humid environments, and they are typically spotted in tropical or other milder climates. Although there are many species in the U.S., only a few species function as pests. The feed on a variety of both animal and plant products as well as paper, clothing, books, and dead insects (bed bugs especially). They also damage more material than they consume and release an unpleasant smell.
Cockroaches species that are cause for concern are Brown-Banded Roaches, Oriental Cockroaches, Wood Roaches, and American Roaches. The German roaches are especially common in urban areas; furthermore, it is the most common species of roach in apartments, houses, hotels, restaurants, etc., in the United States and most other areas of the industrialized world.