Glowworms don’t like loud noises – so remember shhh! when you are in the grotto.
The light emitted from the glowworm has been estimated to be equivalent to one thousandth of a millionth of a watt (one nanowatt) in intensity.
The Te Anau Glowworm caves are approximately 12,000 years old. The Glowworm caves are part of the ‘youngest’ section of the greater Aurora system.
Due to youth, the caves are considered 'high energy', the risk of flooding and low stalactite and stalagmite growth are a sign of this.