Bed Bugs are wingless insects and measure about half a centimetre long. They have flat, oval-shaped bodies with 6 legs each. Moreover, they are light brown and may change in colour to dark red after a meal of blood. They also have squat heads, large antennae, and large mouth parts. They are nocturnal parasites and prefer to hide in the seams of a mattress, where food (blood) is readily available.