This video says about itself:
Freaky snail sex scene in the midst of nature. Footage- “Microcosmos.” “Sexy Boy” by Air sets the mood.
Two snail species, new for The Netherlands, have been discovered.
They are a recent imigrant, the originally southern European land snail Xerotricha apicina (Lamarck, 1822), discovered for the first time in The Netherlands in a coastal dune area near IJmuiden (Noord-Holland province).
And Balea heydeni, a species which has been in The Netherlands for a long time, but had not been recognized as a separate species due to similarity with another species.
Tahitian tree snails: here.
Extinction of Aldabra banded snail: here.