This video is about fungi.
Translated from the Dutch Mycological Society:
Wednesday, December 17th, 2014
During an excursion by a Dutch waxcap study group on the ground layer of a fortress belonging to the Defence Line of Amsterdam many very rare bitter waxcaps were discovered. They spoke about hundreds of specimens. Such a number is unique both for the Netherlands and abroad.
Besides the bitter waxcaps there were even more unusual species on the fortresses like Hygrocybe fornicata, Hygrocybe quieta, scarlet hood, Hygrocybe irrigata, butter waxcap, Hygrocybe insipida and masses copies of Hygrocybe psittacina.