Deputies on the scene discovered a second male who had stopped breathing and exhibited signs of an overdose. (businessinsider.com)
To determine whether females could tell one bleat from another, Charlton played six consecutive calls from one male, followed by the call of a second male, then another call from the first male. (newscientist.com)
«The colored heads allowed us to better study the physical displacement of the «resident» sperm by the second male from the female's storage organs. (sciencedaily.com)