The Hamlet Project

Hamlet seems to know an awful lot about apes. Why? Are apes native to Denmark? I should think not. Nor to England either.
Maybe there’s a Danish Royal Zoo? Or a touring wild animal show? I am very curious about where this knowledge of apes comes from.
Or is it not knowledge? Just imagined ape behavior? This is such a specific image. It just feels like something Hamlet (or Shakespeare) witnessed.