Adult bedbugs are indeed visible to the human eye — although some of us may need to put on our prescription glasses. Bedbugs are usually about the size of an apple seed, which is about 5 to 7 millimeters long, according to the Environmental Protection Agency.

Can you have bed bugs and not see them?

These insects lead a very cryptic and secretive lifestyle and will often go undetected. It is best to have a highly trained professional conduct the inspection for you. Occasionally you may see evidence of a bed bug infestation without actually seeing any bed bugs. Bed bugs leave fecal stains in the areas they inhabit.

Can you see bed bugs with the naked eye?

Recognising bed bugs and their eggs

Bed bugs have the following characteristics: They are visible to the naked eye. Adult bed bugs are usually brown in colour. When filled with blood, their colour ranges from red to dark brown.