What are the Shapes and Sizes of Bed Bug

What are the Shapes and Sizes of Bed Bug

Bed Bugs are Oval or elliptical shaped and brownish in color. It’s very small as an apple seed in size. They are living on the blood of Humans and Animals. After the feed, they look reddish. Adult bed bugs have plane bodies but enlarge after feeding. 

Their life cycle is different than other insects. After egg, they have 5 stages before reach in maturity. To change each stage they need a meal of blood. These five stages are known as Nymph.

What are the sizes of bedbugs?

Unlike other insects, they have 7 stages in their life cycle. In each stage their sizes are different. Here is a chart of sizes below:

Bed bug life cycle images:

1. Eggs: 1.5 mm long. In the above picture, the leftmost is showing an egg.

There are five stages of Nymph are given below:

2. Nymph: The first stage – takes in a blood meal, then molts.

3. Nymph: Second stage – 2.0 mm long, takes in a blood meal, then molts.

4. Nymph: Third stage – 2.5 mm long, takes in a blood meal, then molts.

5. Nymph: Fourth stage – 3.0 mm long, takes in a blood meal, then molts.

6. Nymph: Fifth stage – 4.5 mm long, takes in a blood meal, then molts.

The last and final stage is adulthood.

7. Adult:  5.5 mm long, takes repeated blood meals over several weeks. Females can lay from 1 to 5 eggs a day up to 500 eggs in a lifetime. They lay eggs singly or in clusters and placed in tight cracks and crevices.

To learn more about the shape and size of the bed bug or bed bugs life cycle, the above picture will give you a clear idea. You’ll see 5 stages of nymph before reaching maturity. Obviously, it’s different than other insects’ life cycles. The female bed bug is larger than the male and lays eggs at maturity.

Sources of Information:

01. Integrated Pest Management – Bed Bugs Removal Guide,

02. Photo: Google Images – unrestricted,

03. The Ohio Department of Aging,

04. South Carolina Department of Health and Environmental Control,

05. The United States Environmental Protection Agency.

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