Nepenthes carnivorous plants in Leiden botanical garden

This video from the Netherlands says about itself:

Nepenthes at Hortus botanicus Leiden (English subtitles)

15 August 2017

The botanical gardens of Leiden are home to many exotic and rare plants. Among these are the carnivorous Nepenthes or Pitcher plants which form one of our key collections. But why do we grow them and do all of them really eat animals?

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