Wings are vestigial in which of the following species of cockroach?

Female Blatta orientalis

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Male Blatta orientalis

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Male Periplanata americana

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Female Periplanata americana

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Solution

The correct option is A Female Blatta orientalis
Blatta orientalis cockroach, female doesn't have the capacity to fly. The male has wings but it cannot fly and the wings cover 3/4 of the body. The female has stub wings just below the head. They generally live in moist areas, that's why these are also called water bug.
Hence, the correct option is A.

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