Bed bugs are oval small brown insects around 5mm in body size.
Bed bugs have flat, oval body shape and measure around 5 mm in length. Their body can double after having a blood meal. Nymphs /their young/ resemble adults but are smaller.
Bed bugs resemble an apple seed in shape colour and size. They are wingless and can not fly or jump. Their flat body allows them to hide in tiny crevices, and to move quickly over surfaces.
Adult bed bugs are a rusty brown colour. This changes to rusty red when their body enlarges after a blood meal. Nymphs are pale and colourless when first hatched, they turn the normal rusty brown colour as they mature. After a blood meal, nymphs can appear bright red.