What you see here is two male chimpanzees who are the same size, but one is walking upright, has his hair up, has a big rock in his hand, and he's the alpha male.
Co tu vidíte, jsou dva šimpanzí samci,  kteří mají stejnou velikost, ale jeden chodí vzpřímeně, má chlupy nahoru a v ruce má velký kámen. To je alfa samec.