The caterpillar of the cork moth; see there.
The butterfly (Nemapogon cloacellus) becomes 7.5 millimetres long and has a wing span of 10 to 14 millimetres. The insect likes to lay its eggs in damp places in the wine cellar. If this happens on a cork, it is eaten by the hatched caterpillar (also called cork worm) and thus leaks, which causes (besides mould) oxidation of the...
Serious sources on the internet are rare - and Wine lexicon from wein.plus is one such source. When researching for my articles, I regularly consult the wein.plus encyclopaedia. There I get reliable and detailed information.
Thomas Götz
Weinberater, Weinblogger und Journalist; Schwendi