![]() The reddish-brown color may continue to darken a bit as the exoskeleton hardens.įrom this point on, adult bed bugs do not shed. When a bed bug is mature, it reaches lengths of five to seven millimeters in size. The signature flattened body becomes more apparent as the bug is on the brink of adulthood. In the final stage, baby bed bugs are about 4.5 millimeters. The rest of the body starts to darken a bit as the full pigmentation creeps in. The abdomen usually has a more significant brown center, too. Stage Fourīed bugs in the fourth stage are around three millimeters big. The brown spot becomes a little more prominent as well. Stage Threeĭuring the third stage, bed bugs are about 2.5 millimeters long. It comes after the bug digests its first several meals. A small dot of brown in the center of the abdomen is standard. Quick Tip: At this point, they may start to exhibit some minor color changes. The average bed bug size at stage two is about two millimeters. Stage Twoĭuring the second stage, these bugs are a little bigger. Between each step, the insect will molt and leave behind a shed exoskeleton! Not only that, but their color will develop from translucent white to a signature reddish-brown. The most obvious is size! Freshly hatched bed bugs are a mere 1.5 millimeters in length! However, they grow pretty quickly after that.īed bugs move through five stages as they grow. They’re fully formed bed bugs, but there are a few physical differences between adults. Stage OneĪfter a brief period of incubation, baby bed bugs emerge from their shell. That means it’s not uncommon to see large quantities of eggs in the same place. Thanks to the aforementioned sticky surface, you might see them on vertical surfaces as well.įemales can lay upwards of 500 eggs in their lifetime. Adult bed bugs lay the eggs on wood and fabric surfaces. ![]() While small, it’s not too tricky to see eggs with the naked eye if you know where to look. ![]() Oftentimes, the eggs appear shiny due to the sticky surface. They’re oval-shaped and take on a bright white color. For some reference, that’s about the size of a pinhead. The only difference between these stages is how big they are! Eggsīed bug eggs are incredibly tiny, measuring only one millimeter long. ![]() From the moment they hatch from their eggs, the insects have the same biological makeup. They don’t have a larval stage or pupate to develop wings. Unlike many other insects you might find around your house, bed bugs do not rely on metamorphosis to grow. Bed Bug Size At Each Stage Of Their LifeĪs we hinted at earlier, bed bugs go through several stages during their life cycle. At only a quarter of an inch at their largest, the pests are perfectly capable of sneaking around your home discreetly. Quick Tip: Because they lack any effective modes of escape, the bed bug’s small size is crucial to their survival. These insects aren’t very fast on foot, either! Interestingly enough, bed bugs have wings, too. Completing the bug’s profile are six legs and two antennae. The abdomen is sporting some fine, gold-colored hairs. The biggest part of their body is the lower abdomen. Upon closer inspection, you’ll notice that the insect has a long and flat build. That means a more reliable way to identify the bed bug is to look closely at its physical features.
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