Pleurodema bibroni; Print; Pleurodema bibroni is a species of frog in the family Leptodactylidae. Its common name is four-eyed frog; although this name can also refer to the genus Pleurodema in general. The common name refers to two inguinal poison glands that resemble eyes. When threatened; the frog lowers its head and raises its rear. When the frog adopts this posture the poison glands are also raised toward the predator. The predator may also confuse the frog's raised posterior for the head of a larger animal.; 1700-1880