Bed Bug Cast Skins/Shells As bed bugs grow from birth to adulthood, they molt, or shed their exoskeletons. The cast skins (bedbug shells) they leave behind can be found in and around their harborages (hideouts) and are definite signs of a growing bed bug population. Credit: Dr. Harold Harlan/AFPMB (CC)
To protect your mattress from an infestation or to curb a mattress infestation that may have occurred, you can purchase a bed bug mattress encasement to trap the bugs inside the encasement or discourage bugs from making a permanent home in your bed.
Bed Bug Behavior and Habit. Understanding the behavior of bed bugs (how they eat, live, and reproduce) will help you to find an infestation before it becomes established and to monitor for the presence of bed bugs after your home has been treated.
What are Bed Bug Shells or Casings Bed bug shells, casings, and exoskeleton are all different names for the same thing. Like many insects, bed bugs have an exoskeleton on their bodies. This exoskeleton is made up of a substance called chitin and is used to support and protect the insect's body.
Bed bug feces ("poop") leave dark stains that look like a felt tip marker stain. The stain will often "bleed" into the fabric and look as if you went to bed with an open sharpie pen. When you inspect for bed bugs, you may find stains like these on your pillow case or sheets or on the mattress itself.
How to Check for Bed Bugs: Find Signs of Where They Hide. Where Bed Bugs Hide; but a sign you have an infestation! They are bed bug egg casings from nymphs (baby bed bugs) that shed their shells and are sticky. 2. This is a full grown bed bug on the end of a mattress. The dark color is a