The answer to 'types of bed bug' is that there are several different species of bed bugs, but the most common type found in homes is the Cimex lectularius, also known as the common bed bug. These small, oval-shaped insects are typically brown or reddish-brown in color and feed on human blood, often at night while people are sleeping.
Other less common types of bed bugs include the tropical bed bug (Cimex hemipterus) and the bat bug (Cimex adjunctus). Tropical bed bugs are found in warmer climates, while bat bugs live in areas where bats are present. However, all bed bug species can infest homes and cause similar problems for homeowners.