The male genital system consists of both external and internal parts. The external male genitalia include the penis, urethra, and scrotum. The internal male genitalia include the seminal vesicle, ...

Predation can lead to the evolution of defensive devices in prey animals. Genitalia, which are used for mating between males and females, have rarely been considered to function as an important ...

Fending off an attacker by swordplay with two genital spines turns out to be a moderately useful form of self-defense for male wasps, an unusual study shows. A mason wasp’s rear spikes may be useless ...

Males of one wasp species use their genitals as an antipredator defense, mimicking females and jabbing potential attackers with spines mounted on their reproductive organs, a new study has found. One ...

A study that involved giving frogs an unpleasant snack has shown that male wasps really can defend themselves with jabs from their genitalia. By Sofia Quaglia The experiment was set up like this in ...