When a male cockroach wants to mate with a female cockroach very much, he will scoot his butt toward her, open his wings and offer her a homemade meal — sugars and fats squished out of his tergal ...
TOKYO—A new study offers a hint why American cockroaches are so hard to get rid of: Females can breed for years and multiply their numbers dozens of times alone, without ever mating with a male.
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