If two dominant male monkeys are placed in the same cage, only one monkey will leave the cage alive.

At the window, the male monkey facing us was urinating copiously on the glass.

The photopigment genes are found in some female monkeys but never in male monkeys of this type.

Unlike other New World monkeys, both male and female howler monkeys have trichromatic color vision.

The male monkey held a tin fiddle, the female a tin flute.

The Boss is a male monkey with grey fur and a heavy stature.

The troops are made of female families, with male monkeys joining the troops individually for periods of a few weeks or months before moving on.

In subordinate male monkeys, for example, the stress of being servile to their alpha counterparts causes damage in the hippocampus.

The male gray woolly monkey weighs an average of 9.5 kg.

Given their genetic makeup one might well wonder how male monkeys, balding and hemophiliac, came to be intelligent!