Numbers
At least 3500 species of cockroaches known worldwide, about 57 found in North America.
Identification
Cockroaches are usually dark brown or reddish in color and have flattened oval bodies and long swept-back antennae. The head is usually concealed by the pronotum which extends far forward. When wings are present, they are held flat over the back of the cockroach, overlapping one another.
Habitat
Though considered tropical insects, cockroaches can flourish in any environment where there is sufficient food and warmth, often infesting buildings.
Life Cycle
Female cockroaches lay packets of 12-25 eggs, and nymphs develop to maturity through simple metamorphosis.
Remarks
Cockroaches are sometimes classified in their own order, Blattodea.
Internet References
Urban Entomology(UC Riverside) life cycle and identification information for 16 species.
Terminix Pest Library - info on 12 species.
