Difference between Periplaneta americana and Blatta orientalis

Periplaneta americana and Blatta orientalis are two species of cockroaches that are commonly found in households and urban areas. While they belong to the same family, Blattidae, they do have some differences. One of the basic differences between these two species is the length of their wings.

1. Body Size:
Both Periplaneta americana and Blatta orientalis are large cockroaches, with Periplaneta americana being slightly larger in size. Periplaneta americana can grow up to 1.5-2 inches in length, while Blatta orientalis typically reaches a length of 1-1.5 inches.

2. Length of Antenna:
The length of the antennae is not a major distinguishing factor between these two species. Both Periplaneta americana and Blatta orientalis have long antennae, which they use to sense their environment and locate food sources.

3. Wings Length:
The most significant difference between Periplaneta americana and Blatta orientalis is the length of their wings. Periplaneta americana has long wings that extend beyond the tip of its abdomen. These wings are well-developed and allow the cockroach to fly short distances. In contrast, Blatta orientalis has shorter wings that do not extend beyond its abdomen. These wings are underdeveloped and are not used for flying. Instead, they serve as protective covers for the abdomen.

4. Life History:
Another aspect where Periplaneta americana and Blatta orientalis differ is in their life history. Periplaneta americana has a shorter life cycle compared to Blatta orientalis. The female Periplaneta americana can produce up to 200-300 eggs in her lifetime, while the female Blatta orientalis can produce around 100-200 eggs. The eggs of both species undergo a similar development process, hatching into nymphs and gradually maturing into adults.

In conclusion, the basic difference between Periplaneta americana and Blatta orientalis lies in the length of their wings. Periplaneta americana has long, well-developed wings that allow it to fly, while Blatta orientalis has shorter, underdeveloped wings that serve as protective covers.