Bedbugs are small, brownish insects that feed solely on the blood of animals. Although common bed bugs prefer feeding on humans, they will also bite other warm-blooded creatures including dogs and cats.
Adult bed bugs are about 3/16-inch long and reddish-brown, with oval, flattened bodies. They can be mistaken for ticks or other household insects due to their size and coloration but they do not fly or jump like fleas. The immature bedbugs (nymphs) resemble the adults in shape but have a lighter brown coloring.