National Geographic
A young male nicknamed Joker was probably the first to start carrying a howler monkey baby on his back for days on end. Then a group of other young males started to copy him.
Read More
These capuchins are abducting babies from howler monkeys—for fun?
Tim Vernimmen
09:20
A young male nicknamed Joker was probably the first to start carrying a howler monkey baby on his back for days on end. Then a group of other young males started to copy him.
